Ovulation spotting or just longer period?

Celine

I don’t know what’s happening with my period but I got it for 10 days for the first time. I normally have a 7-day menstrual cycle.

First day, dark reddish brown then the next 2-3 days, it looked like it’s just brown spotting (like when you prick your finger with a needle, like drops of blood) then when i thought my period’s going to be over, it just got heavier for 4 days then lighter by the end.

I had sex a week before the first day.

Help?