Fighting with Fiance

So my fiance and I have been kinda arguing ever since we had to get plan b. I dont know what's going on with him, he wont talk to me. Last night since he wouldn't text me other than one worded answers I told him I'd talk to him later. He then responded with "okay?" Like I didnt want to talk. I tried to get him to talk to me, I told him I was there for him. I don't know if hes upset cause i said "bruh" in a text or what but when i said i was going to sleep he said "night fam". Kinda responding to me like im just a friend now. I don't know how to feel or what to do I asked him if he needed space but his response was "did I ask for space?" Hes been hurt in the past but idk how to help or how to get him to talk to me. I'm frustrated.