Late periods?!?

Em

Lady’s I need help. I am 16 and I’m 10 days late for my period. This is clearly negative and I feel like there are a few reasons I could be late. 1. I started lifting everyday midway through the month 2. I had the flu the middle of last month and ended it with a bad cold (google said that can make you late lol) 3. Idk if it’s possible my UTI meds are making me late???

(I’m not on birth control due to the fact that my mother is very anti all that stuff.... any suggestions?)