Should we break up

I have been with my fiancé for 4 years and I feel conflicted. I love him but also hate him and I don't know what to do. I'm 28 weeks pregnant and think that might be why I hate him but the last month or so I can't stand being around him we have good days and days where I hate him. I think it's best for me and the baby if we aren't together anymore. 
Please so hate this is killing me I just need some advice. Is it the hormones or should I end this?