Alzheimer's/dementia or just "old age?"

Forgive me if I'm in the wrong place. I've been scouring the internet for hours and at this point I'm exhausted. I'm just curious as to whether or not my mom is showing some early signs of something serious or if it could be attributed to "old age." My mother is 69-years-old and is roughly 19 hours away. Over the past few years, I've noticed some concerning behavior. This could also be an underlying mental issue that has been misdiagnosed or not diagnosed at all. First off, my mother has always been..er...difficult. She reacts irrationally to situations, a master manipulator and is always the victim. But as I mentioned, this behavior, along with other things, is raising some red flags. I'll just outline some things that are particularly strange. Again, these could be other things, but the behavior is constant. 1. She has NO filter. She used to keep many things to herself and now she's like a loose cannon. She was also the type that would privately gossip, but now she often says things publicly and in mixed company. For example, my cousin suffers from Trichotillomania and Body Dysmorphic Disorder, which she's aware of. She will open talk about how gross it is that she pulls her eyebrows out, in front of her, and how annoying it is. She'll also say rude things to her, around her and on social media regarding her appearance. Things like, "this is a terrible picture of you," or "how could you go out in public like that?" This goes for anyone, but I just used that as an example. She does the same to me and often brings up very private things publicly. 2. She sends me really random things for no reason. At one point she was sending things weekly and I informed her that I didn't have anymore room for things. She's sent food in the mail, wrapped food in wrapping paper for Christmas and sent it to us because she thought it would be "funny" and sends me her old clothes, knowing I'm considerably smaller than she is. For my son's first birthday she sent us some clothes that were 4T and 5T, thinking they were going to fit him. She sends him candy, despite me telling her on numerous occasions that we very rarely let him eat candy. Most treats are homemade cookies or cake for celebrations. She'll send used makeup, she sent us an antenna, a lantern, sewing kit with rusty needles and pins, a clock, calendars, etc. 3. She'll get spam messages on Facebook (the ones looking for phones, money, etc) and actually talk to them despite me telling her how dangerous it is. She gave one man my full name, as well as my husband's and son's, our city and state as well as our ages. 4. I'm not sure that she actually knows my age. On more than one occasion she's told someone I was older or younger than I am. It was about 4 months after my 31st birthday and she told someone I was 30. Another time she told someone I was 31 when I hadn't yet turned 30. These are the only examples I'm aware of and they might be nothing, but this has never been an issue. 5. About a week ago I posted a picture of some gum paste creations. I'm working on these details for my son's cake because they're quite difficult and gum paste keeps for a pretty long while. I mentioned finishing up the ones for this year and getting started on next year, then asked if anyone had any guesses for next year's cake. She replied, telling me to make a car or something else he liked. I responded, telling her this year's cake and next year's had already been decided. I was just getting the details taken care of so I could simply assemble the cakes. Today she asked me if I decided on what cake I was making for his birthday. 6. She seems to be very careless with money. She's on a very fixed income and spends money on things she doesn't need. I've told her numerous times that we have issues with things arriving here on time, as well as UPS and FedEx rerouting things to the post office. She still insists on sending everything via 2-day shipping, even though we may not see the item for a week. So she's spending a ridiculous amount for no reason, as well as on the things she's sending us. She's paying quite a large amount for cable, making purchases online, etc. 7. She doesn't quite understand that I'm quite busy, despite being home. My husband is disabled (brain damage due to a car accident that inhibits his basic processing, reaction, focus and memory) so I basically raise our son by myself, cook, clean and everything else. If we go a certain amount of time without talking she thinks I'm mad at her and makes a huge fuss. She does the same with other people. If they don't pay her enough attention she gets irrational and throws tantrums. These are just some of the things I can think of. Again, this might be nothing at all. But the behavior is increasingly more severe and honestly, she's difficult to deal with. Every interaction we have involves one or more of these things. I'm in no position to care for her. I don't have the resources to care for her in anyway, shape or form.