I'm sick of trying to please everyone. I have endometriosis and I'm in a lot of pain today. I was supposed to be doing a birthday cake for my friends daughter's 3rd birthday. I let my friend know I may not be able to bring the cake as I'm unwell, she was angry and said she'd pick one up, tried to make me feel guilty etc. I said no worries, I'll just bring it up later. I've just finished the cake while being doubled over in pain and had to tell me friend I'm really sorry but I can't drop the cake off. The party is in an hour and my friend is really angry, trying to make me feel guilty. I've apologised and she knows about my health issue but all she cares about is that her daughter hasn't got a birthday cake for her party. I told her I was going to bring it up tonight anyway but that's not good enough. AIBU?