Okay, my boyfriend for about more than a year and I had unprotected sex. I take birth control. Even though he didn't ejactualate in me is it still possible that there was a pre? This was maybe about 2 or 3 weeks ago (I try to keep updated) and I've gotten a bladder infection and been feeling tired and nauseated for about the pass week. Could this be possible pregnancy? And I do plan on going to get a test tomorrow just to be safe... What is the best brand to get? Thank you.