Mental Health Issues.

Hey, I'm a young ftm. I'm only 24 weeks but I'm having a hard time and there really isn't anyone for me to talk to. I've had mental issues in the past, and I guess I was happy and okay for 3 months before I fell pregnant. I didn't know that it would effect me this much. I know some might think that it's stupid, why get pregnant when I have mental issues? I guess that's fair. But honestly has anyone had mental issues in the past before, during or even after pregnancy. I've been diagnosed in the past with depression (only mild) , anxiety and a personality disorder that I can't really remember the name of. I won't go on but I. Am. Struggling. And I thought I could talk to my boyfriend but I can't. He doesn't get it.😖 I love my baby but I am really unhappy and all of this excess weight gain and being isolated and having no friends AT ALL and my emotions running wild.. How on earth am I supposed to cope?