Started my period two weeks after last.

So the last three years, i had been on birth control. (Depo shot) i was supposed to get a shot in january and never did. The whole 3 years i had no period. I got my first period again in june. (18-22) and then again july (18-22). The last few days ive been really horny and last night my bf and i had pretty rough sex twice. Today i began bleeding again.. Its pretty normal flow. Before i started birth control, i always had prtty regular periods, but i know you're body goes outa wack once you get off birth control after a long time.. So should i be worried about this bleeding?