What date do I use?

Confused on what date I should use so I had a miscarriage recently, I started spotting brown on July 8 for about a week and then it turned bright red July 15-21 with the last 2 days being just spotting haven’t bled since kind of wondering when should I expect my period! Wedding is Aug 26 and a few trips right after definitely don’t want to just start bleeding out of nowhere.