I'm really conflicted.. Desperately need advice.

I'm pregnant and maybe it's my hormones I'm not sure, but my husband I guess is trying in a way. I know he has a lot on him but like I tried to talk to him about some things earlier (me confused if I needed to stay or leave) and he said I worry about dumb things. I'll leave the message I typed out for him. I'm super emotional right now so I can't really talk face to face without crying.

But besides that I feel like he's hiding something from me. I just have that feeling. We haven't had sex in literally almost a month. He doesn't comment on my appearance or nothing anymore. And he's literally checking out other women. We're arguing like crazy. I'm just so heartbroken. I don't want my child to be in a broken home and I know he would be a wonderful father. And for the most part he's a good husband. Other than the last month. I'm not sure what to do and really need some advice. I'm begging anyone to help. I'm tired of crying all the time and feeling so depressed and confused.