I need advice someone to listen feel I have no one to talk to.

me and my fiance kinda moved fast we have been friends for over a year and realized we were in love we lived in different states. within the 4 months we been together I moved here with him got engaged renting a house and now 9 weeks pregnant with twins, but it seems like everything I say to him anymore we argue about it and it kills me my emotions are so crazy we never argued before all of this. I don't know if he is just stressed out working so much and with twins on the way or if he is second guessing it all or what? all I've been doing for 2 days is crying I just want it to go back to where we were happy and never argued were still happy but the arguing is killing it