pregnant?

Alishia
I am 3 days late on my period. I have sore breasts and an amazing sex drive. No cramping. I had unprotected sex with a guy that didn't pull out July 31. I had a period two weeks after that and nothing since. Should I be worried? I just stopped taking birth control July 1st. Also. Just had sex again Friday, unprotected and he did not pull out. Help!