Possibly pregnant?

Kyndra

So i had my period last month Sept 20- 25 which my period is normally 8 or 9 days long so that was really short for me , then this month i got my period the 18-23 but it was starting an stopping when normally i have a heavy flow but this time it was mainly dark brown light pink. I've been super bloated , my boobs are sore, i feel nausous at random times in the day an today i started spotting light pink ( might have been from rough intercourse though ) But i took a pregnancy test about a week ago an it came up negitive. But I also didn't find out i was pregnant with my daughter until i was 9 weeks along. I just want to know everyones opinion or if people have had there periods an ended up pregnant after. Thank you ahead of time 😊