My sympathy Infergar. Constant pain is debilitating and we feel sensitive when we're feeling low even the smallest things can get you down. The thing is, if we've always been the confident, capable Mum, we're suddenly not who they thought we were.
My daughter could see and hear the pain and distress I was going through, but her voice had an edge to it which hurt at the time. but I now recognise as fear. Looking back after a few weeks, I know she was afraid. She could see her mother losing it! She left her home and came and cared for me, working from here as she does at home. She hugged me as I wept, but got cross when I said I wasn't hungry or when I forgot to take my meds. She thought I wasn't trying to get better. She didn't want to see her Mum as weak and incapable of taking care of herself.
I was afraid, and being tough was her way of coping. All is calm now. I am well and she has gone home. I know she loves me beyond all measure, and I have put the times I thought she was being harsh with me down to her fears.
Take good care of yourself. Have a chat with your children and tell them how things have changed for you. Get the help you need for your pain. Wishing you well.
Lebanon to be heavily bombed (title edited by MNHQ at request of OP)
Working in someone else's home

. Having said that I think your daughters comment was meant to be lighthearted with no intent to hurt you..