No emotional connection

So me and my fiancé haven't had sex in close to 4 months and I'm just not sexually/emotionally connected to him anymore. We were laying in bed this morning and he cuddled up to my backside and starts rubbing my boobs and i knew what he was going for then and I just started crying cause I hate when he touches me sexually and he said "why are you crying?!" And I said "cause I just have no emotion or feelings when we have sex anymore" and he stormed outta the room and said well I guess I'll just go help myself! Please tell me this changes after pregnancy!