helpppp!

Could this be a serious issue or due to pregnancy I literally sit on the toilet pushing for like 5 hours for this giant turd to come out and I bleed and vomit it's sooo exhausting I seriously cannot do this anymore what can I take to help I drink prune juice and eat probiotic yogurt and nothing. This happens about once every other week since I first got pregnant I'm 5 months and I feel like if this happens again I'm going to give birth lol no but seriously what to do!?