MC???please helpp

Im not pregnant yet but if i do get pregnant this would be my 1st baby also im on risk for mc since i have pcos!! What are some things i can be aware of or do so i dont have a mc?? Just want to prepare for it ... i been ttc for years and havent got a bfp my whole life doc said it will happen it will take time to get pregnant .. i dont want to get a bfp and than mc i want to be extra careful what should i do?? Get it monitor more ofter when i do fall preg?? Idk please help