How do you handle things for two and getting very tired?

Stephtren47: Imho, you are going to require respite through any means possible. I am so sorry for the loss of your child.

Get more help. Basically, you can not do it all 24/7. Every person needs enough of a break to:
sleep 7-9 hours uninterrupted.
eat 3 healthy meals at a reasonable pace,
meet their own health and hygiene needs.
have a little time off daily and more weekly for fun activities.

Ask family, friends, members of faith community, and paid help to give you a hand. Also consider what other ways to lighten your usual load of tasks: online shopping, yard service, housecleaning service, somebody to do laundry, somebody to do handyman tasks... or people who will volunteer to do these for you.

So sorry to hear about your situation - incredibly tough for you,..hugs..
Please look into hiring outside help like the others have suggested.

According to your profile, you are not only caring for your husband , but you also lost your only child 3 years ago. That's a lot. I'm sure you are still grieving the loss of your child and are also grieving(anticipatory)the loss of your husband and the man he once was. That would make anyone tired. I hope you have some help coming in to assist you and give you some much needed breaks, as it's important to take care of yourself through this whole process too.
Lewy Body Dementia only continues to get worse, so it may also be time to be looking into the appropriate facility for your husband to be placed in. That would allow the professionals to care for him, and you could get back to just being his wife.
You are to the point now, where you not only have to do what is best for your husband, but also what is best for you. May God bless you and keep you.

I'm very sorry for the loss of your child. I, too, have lost a child, and it's a very different kind of loss.

Wow, you have been dealt a tough hand there. So sorry for the loss of your child. And for your husband's diagnosis.

Are you the one that's very tired? As a caregiver, that is not surprising. You need to get some help to care for him so that you can get a break from the work and the stress.

Good luck.

I'm assuming you're talking about your husband and yourself. Are you able to make time for self-care? Getting regular breaks and some days off? If not, have you considered outside help, like from an agency or adult day care for him? If finances are an issue you can contact your county's social services (online at the Dept of Health and Human Services) to have him assessed to see if he qualifies for some in-home services like light housekeeping, laundry, food prep, hygiene help. Or contact your local area's Agency on Aging for resources. Please provide more details so we can provide more specific suggestions for you. Peace!