I need help😂

Here’s some background info. I recently lost my virginity to my bf, but it was so painful that I made him pull out really quick. It didn’t last more than several seconds. He didn’t cum inside me but I’m worried about pre cum. This was about 3 weeks ago and I was supposed to start my period two weeks ago. A few days after it happened I was having this weird brownish discharge for about 3-4 days. I’m almost a week late, and I read about early pregnancy symptoms (fatigue, mood swings, boob tenderness, etc) and my body is showing all of them. If I’m completely wrong just let me know, I have no kind of experience or knowledge over this kind of stuff at all...😂😂 PLEASE just give me more information, or share knowledge so I can try to figure out what’s happening with my body☺️