My (f28) fiancé (m30) is MIA and I don’t know what to do

TL;DR: My fiancé MIA after we argued. We’ve been trying to conceive for a year. Not sure if I should reach out or wait for him to come back, and if he does what our next steps are. <br><br>About a month ago my fiancé and I were talking about where I wanted to live after we’re married and have kids. I have a large extended family living in other country, and I want to live there, close with my parents and siblings. My fiancé never stated explicitly where he wanted to live post kids, but considering he changed his name to that of his dad’s and he is very attached to his family I thought it would be rude to even bring up anything that’s not close with his family. I MIGHT have said something like “are you sure you don’t want to live in the city MIA is in?”. He was really upset by it, and asked MIA “are you considering moving?”. MIA said “I was always planning on it. It’s not fair for me to move to the country all my life and live away from my siblings and parents”. This has sent my fiancé into a tailspin. I tried to talk to him last week but he was very short and didn’t say anything to me. Last night he received a call from a girl he went on a date with before we were engaged, and he left the house to go talk to her (I didn’t know he was still in contact with her). I haven’t seen him since he MIA last night and I have no idea where he is. This has been really hard for me, as I have MIA for years and he has always been there for me while I was dealing with infertility problems and depression. I don’t know what to do. I’m currently hiding in my room so my kids and his kids don’t see me cry. I don’t know if I should reach out and try to talk to him, or wait for him to come back. I know we’re engaged and I’m “supposed” to wait for him to come back, but it’s so hard for me to be alone right now.