Is it possible?

I still think I could be pregnant even though doctor said I'm probably just regulating. We bd so much in August I would be surprised if I wasn't. I'm not on cd 62 on a 28 to 30 days cycles. Haven't seen AF since July 27th. I'm exhausted and recently my boobs started hurting. I'm still testing negative, do you think it could be possible still? Doctor said wait until the end of October to go to obgyn if AF still hasn't come