Don’t know how to feel... advice??

After 2 early miscarriages, none in which got to a point where a heartbeat was detected, I don’t know how to feel about ttc. I get pregnant quickly(at least so far) but I don’t have confidence in myself to be able to carry. I want to start progesterone and baby aspirin this time around. Can anyone tell me when you would start taking these types of things?? Like right after period?? Or after ovulation? Any suggestions would be super helpful!! Thanks ladies ❤️