Need answers

Madison

So I was on my period for 7 weeks. The doctor put me on progesterone for 10 days. Well I'm on day 5 and I just started bleeding again. It completely stopped after the first day. My doctor said that I need to wait until I bleed again for me to take clomid. If my period doesn't stop, how would I know which day is considered day 1 of my cycle? I just need someone to help explain this to me 😭