I wish I could tell you some magic way to stop the tears, I know how stressful it is especially when you can't control it. In the beginning of my pregnancy I used to burst into tears randomly with no warning, it's just hormones shifting. You just gotta kind of realize that it's hormones and it's normal and find something to distract yourself with, like a youtube video or a craft or something.
Funny story, I was laying on the couch crying one day for no reason at all, so I started laughing at myself and when my hubby came home from work he found me crying and laughing like a hyena and he was so confused because he didn't know what to do.
Talk to your fiance. Tell him you are feeling lonely and ask him to spend some more time with you. Let him know you aren't doing it to try and.control him , you just really need the support that only he can offer you. If he doesn't listen, give it a few days and talk to him again.
You should stop hurting your self and the baby. I'm getting signs of pre labor. Becouse I have been depressed this week. Yesterday I was spoting and today I'm getting contractions. Don't let anyone hurt you. Keep your head up and think about the baby. Good luck