mental illness and pregnancy?

Hi, i'm 21 years old with manic depressive episodes, bi-polar disorder and major generalize anxiety disorder/social anxiety. I am so scared how this is going to affect me during my pregnancy. Do you think it's going to get worse? Should I consider not becoming a mother at all? I'm only a month pregnant and I still have time to think about this decision(yes i know this is controversial, but I need REAL advice) I am so scared I'm going to be a bad mother/have suicidal thoughts throughout my pregnancy. Has anyone else with mental illness gone through this? And what was your decision?