Confused

Dafne
So the app said i was in my fertile week, but i started bleeding and it wasnt brown or pink only lasted two days, very confused! And my boyfriend and i use the withdrawal method but when i have my period he comes inside. So because i was bleeding we figured it was ok, but the bleeding only lasted two days, how could i bleed on the week the app
Says im fertile? Did i have my period or was i fertile?