How to stay pregnant?

So I have a question I just found out my pregnant now I’ve had 4 miscarriages sadly am very scared no my question see there anything I can do or suggestions? My sister in law would take some pills durning her pregnancy that the doctor gave her unfortunately we are not in good terms so she won’t tell me guys anything you can help me in I hace a doctor appt till end of March which I think it’s stupid due to am high risk thank you