Period cycle (sorry if too open with things)

I'm 16 years old and I'm sexually active with my boyfriend. About 10 days ago I started having odd symptoms where I had brownish discharge and such, I was worried and all but then two days went by and I started bleeding but very lightly with no cramps or anything. I just though it was an abnormal period and went with it, but when I thought I was done after 7 days (that's usually how long my cycle lasts) I started bleeding like my usual period would which it's really heavy the first day and pretty bad cramps. I'm worried something might be wrong and was wondering if anyone could give me any answers. Thank you.

[Starry]

Are you using condoms? Rough sex , ovulation, and vaginal infections all sound common possible causes.

m.newhealthadvisor.com/Ligh...