I can relate to meltdown!
The other day I lost it when Will wanted a window closed. He is always cold and I am very warm. I like fresh air (although polluted) in the house coming in from open doors and windows. I am overloaded with all the responsibilities now being on me, his health issues (heart) and trying to find out where we should be and file for Medicaid.
After my meltdown, Will cried because I was so upset and I don’t want him to get upset and cry! It’s the last thing I want him to do! I don’t want to meltdown in front of him again, so venting here I believe would help. He told me that it was OK to leave the window open just a little instead of closed all the way. He can be sweet and considerate and he doesn’t want me to get upset either. I feel so bad because I made him cry!

Last night he decided to shave his head and beard instead of watching it fall out. Now he looks like Daddy Warbucks. We had a good laugh.
Today is another day.

Ah, caregiver meltdown. I can relate. I have to keep reminding myself to breathe. What I find is that as my caregiver responsibilities increase: wife 10%:caregiver 90% today, I am less communicative with my partner. It takes so much effort to speak, verify that he heard me, confirm what he heard and then make sure he follows through. Frankly, the tipping point for me is closer than I realized and I am actively seeking a place for him to live separately from me. I am tired of being frustrated and angry. Keep breathing. Find peaceful moments for yourself every day.