We recently decided to stop using the protection. We had unprotected sex roughly around my period due date so I kind of knew I wouldn't end up pregnant from that time. But my period never came. We didn't have sex for about a week and a half after that but still no period. Numerous HPT with BFN. Attended the doctor and another urine test showed a BFN. She did an ultrasound and couldn't see anything, said she couldn't see a sack and it looked like I was due a period due to thick endometrium layer but said it's not 100%. I'm now 24 days late and still no sign of my period or pregnancy - last HPT was 4 days ago. I'm due back to the doctor next week. My question is this: Could I have ovulated late and the unprotected sex we had around my period due date and the later unprotected sex we had, have resulted in pregnancy? Could I have gotten pregnant recently and it's still to early to show up on a HPT? I'm so so new to all of this. All advice would be helpful. Thanks.