Selfish long sorry

So I guess I just need to vent. My husband is only ever concerned about himself, I've got more than my fair share of problems leaky heart valves, hip dysplasia, chiari malformation, chronic pancreatitis I was a hot mess single mom before we ever got serious we have an almost 8 year old and an almost 3 year old I'm 27 weeks with our 3rd and last and have pneumonia for the second time this year. I feel like shit I'm in constant pain worse than my normal day to day pain counting the SPD that I now have I guess it's more pronounced now that I'm an emotional mess but he doesn't care about anyone but himself never asks if I'm alright or if he can help with anything we both work full time physical jobs but I'm the only one to cook dinner and if he does he complains about it so much it's not worth it. Sex just isn't happening lately he has no idea but I was so uncomfortable the last time we did I cried during and he never noticed. Calls me a selfish asshole if I won't jack him off  says I'm not fufilling his needs my heart just hurts