So I had intercourse the day before my period then it came on the next day.

So period passes and I don't have unprotected sex again until about a week later then again 4 days after that on the 14th and we did some rounds but on the second one there was this real bad cramp every time he would go in but I figured it was just from the deep penetration. Soon after I got this brown discharge and my stomach was hurting still for a couple days but I'm fine now. I had also been really congested and sneezing a lot the past couple days. The next day the 15th I would get heat flashes and feel nauseous, and slight headaches so I thought I was getting the flu, but those symptoms only lasted until Wednesday it's Thursday now the 17th and I'm fine. but my main thing is idk if I'm pregnant or if it was deep penetration stomach pain and not child development pain, or if it was season change sickness bc I do have allergies, or if the brown discharge was signs of pregnancy, and it's also oderless btw, or if it's just something like bacteria over growth or something to do with us have intercourse, bc my discharge was normal before we even did anything on the 11th and 14th it was the normal whitish cleaning discharge. But my next period isn't for 9 days SOMEONE PLS HELP