Not Really Sure If I’m Pregnant Or Not

I had unprotected not even a whole week ago….and well my boyfriend "came" in me. But like out of no where i just started bleeding this morning…..and i’m not due to come on my period till the end of the month….because i just came off not even a whole two wks ago. Its not like the bleeding that i normally get when i’m on my period…..its a little lighter. I’m not having the symptoms of being pregnant but i also know there’s a possiblity that I could be. A friend of mine told me that this is what happened to her before she found out she was pregnant she came on her period twice and didn’t come on anymore……..Please Help Me i’m so confused.