My mother passed 6 weeks ago and I still have hives. She was 91 with LBD. How long before my mind and body get back in sync?

You are doing what you can and you have excellent insight, and are "moving along" already with one foot in front of the other. BUT you are also dealing with your own illness. I find that anything even related to the herpes viruses comes along really really hard with any emotional upset so am not surprised about the shingles. The hives--just be certain this isn't related to your own medications. Once at the end of a difficult marriage I did suffer hives. I could run my finger up my arm and the skin would raise.
If you even suspect you could use a counseling session or two please consider a licensed social worker in private practice--they are good and quick at life transitions work and guiding you.
My heart goes out to you; there's a lot on your plate. I am sorry for your loss. I hope you will put yourself first now going forward.

Maybe see your dr to get hives under control, a little temporary help with the anxiety , fall out. And a referral for counseling if you feel you need it. Nothing wrong with asking for the medication help…

My deepest condolences on the loss of your mom. You have definitely been through the wringer. I would look for a therapist to discuss grief, mind/body and living with serious health concerns in a heartbeat were I in your shoes. Talking it all out with a pro, getting it all out. . . Especially since I know for me, personally, emotional stress causes or exacerbates physical stuff.