15 And Haven't Had My Period Before. Condom Broke And

15 and haven't had my period before. Condom broke and took morning after pill, and after 5 days, i am now bleeding. It is a heavy-ish flow and there are some clots, i have read that this is normal in periods but i don't know if this is also a side affect of the morning after pill.
Is this normal?
How long will the bleeding last?