33 and half weeks

I'm 33 and half weeks pregnant with my fourth pregnancy my third girl.. My last pregnancy was a miscarriage and had to have a dnc. Anyways I'm having to have 2 non stress test a week since 30 weeks. I have a complete placenta previa and been having some bleeding. Also my iron is low and on a supplement for that.. My sciatic nerve is being the devil. The past 3 days having bad burning sensation in my chest and reflex to the point I gag and it's horrible. But for a week I can't hardly breathe sitting down laying down or walking to the bathroom. I'm a dag gone mess. I have a appointment at 9am. I will tell my doc this. My oldest is 14 she was 33 days early and my youngest is 5 she was 3 and half weeks early.