3 weeks prego ? Impossible? Thoughts please!

Princess

I usually ovulate on the 6th-8th of each month. But on Sept 9th I had unprotected sex. Since then I've been super tired and hungry. And been having dreams about pregnancy. But me being prego is totally impossible because it's too early. Also my period is suppose to start on the 19 of Sept which is this coming Tuesday. Am I just losing my mind? And should wait and see if my period comes? I haven't thrown up or anything. It's too early to make accusations. Also had really bad cramping this morning.. TMI he told me he deff did precum in me and he told me when he was about to cum he tried to take it out as fast as he could but he's not sure if he was fast enough for all of it. ( I'm sorry if it's too nasty for you guys). UPDATE; I missed my period and gott a lot of cramping yesterday and today