ready to give up :(

I'm not one to give up so please know this is very hard for me to grasp.. long post so bare with me and thank you in advance for any advice!  
My fiancé and I have been through hell and back together. I've had to get over him having a mental relationship with another woman in the past (never physical but hurts just as bad), we went to counseling and decided we wanted to be together and work on us. After several months we decided we wanted another baby (we have a 3 year old daughter).. he is a professional body builder so we got on clomid to help with pregnancy, 3 months later I found out I was pregnant. We both couldn't be more excited that it happened so soon. Fast forward to a few months into my pregnancy he gets a job promotion and it requires a move to Texas. My whole family is in Arizona, I'm extremely close to them and have never lived away from them so this wasn't an easy thing for me. He decided to take the offer and moved to Texas early September, I stayed back in Arizona to finish out my time at my job and spend some time with my family before making the decision it would be best for him and I that I move there to show him I support him and love him. I moved here a month ago and things just seem to be going down hill. His job requires him to post of social media a lot but he also posts a picture every time he's at the gym or whatever else, NEVER ANYTHING ABOUT US!! I understand this may sound so immature but let me explain that if he never posted on social media I could care less. The fact that he posts several times a day but has not posted about me, us or our kids in months bothers the hell out of me. 
I went into pre term labor last week, spent 4 days in the hospital and thankfully they were able to stop my labor. He spent a whole 5 hours there with me the whole time I was there. I'm now on strict bed rest at home WITH our 3 year old while he's at work all day (I get he has to work to support us) my problem is, he is SO disconnected from this pregnancy it's really starting to push me away. He didn't go to the dr with me yesterday, and won't be going to the last ultra sound on Thursday. He has absolutely no idea how severe what I'm going through is. So much so that he asked me to go to the mall and get his secret Santa gift for him today... IM ON STRICT BED REST! :( This is most likely our last baby and I've never felt so alone and not important. I'm honestly ready to pack up and go back to where I'm wanted with my siblings and parents unless something changes.. I love him to death, he is my bestfriend but damnit a woman can only take on so much before a breaking point hits. I'm absolutely alone here in Texas, I don't know anyone. He's the only one I have here and he just doesn't get it. 
Let me also add he is a 40 year old man and I'm 26.. I've communicated my feelings and he does not understand.