help me please, I'm begging you.

I just had to have a cerclage put in a week and a half ago, and I haven't been able to have sex with my boyfriend. no objects in the vagina they keep telling me. until they check on the stitch I believe. I don't know but I've been very good about trying to meet my boyfriends needs by giving him lots of head and trying anal but it hurts so bad because he's so big I can never let him in there. so now he says "what if we can't have sex the rest of the pregnancy what are you gonna do" and I said I don't know and he's like well somethings gotta give either you let me do anal or I'm probably gonna break up with you. now please tell me I have every right to be upset over this. he also wanted this baby and he knew I was going to have to have surgery and he's like "well I didn't know i wouldn't be able to have sex" and now he went for a walk and I'm sitting here crying my eyes out because I love him to death and I don't wanna not be with him anymore but this really hurt my feelings. I can't help that anal hurts me. someone please give me advice. should I leave? or should I just man up and let him do anal no matter how much it hurts?