On 8/12/19 and 8/17/19 my boyfriend and I had unprotected sex during my fertile window then we had unprotected sex again 8/23/19. All three times he pulled out so he didn't finish inside of me. I'm almost 99% sure he had precum on his penis all three times. I'm also not on any bc and I didn't take plan b. We used to have unprotected sex a lot about a year ago and I never got pregnant. Do you think I could be pregnant?