Hi so im 16. Me and my boyfriend had unprotected sex on the 2nd my period was the 5 th of August then again on the 14th I. Ovalated the 18th. I been extremely tired and my breast hurt. Well I suppose to start September 2 but on the 30th of August when I wiped it was a small amour of brown and light pink. The 31st it was a little heavier but mostly brown today its red still light but with dark clumps? This is not like my normal period. What's the chances of being pregnant and when can I find out?