30 weeks pregnant, is what Im dealing with now normal?

I am 30 weeks along and in a lot of pain and lost on as what to do. I am unable to sleep well at all at night. I wake up in pain around my abdomen as well as some vaginal pressure when she moves.I have been so stressed that i think it it causing me problems. I get abdominal pain then I had light pink spotting. My obgyn said it's okay but if I have a heavy flow then I should worry. I am scared about going in to premature labor and don't know what to do. I cant keep my stress down as me and the father of this baby live together and its just stressful how he treats me at times. I have a son already but he was premature by 3 months so I was never this far along and don't know what to expect. I want to go as full-term as I can to keep her healthy and avoid the NICU. Please give me any advice you have at all on this. Thanks..