I'm 22 and had sex for the first time with my boyfriend a month ago, since then we've had sex maybe 5 times all while using a condom. I'm not on birth control yet so I've been very cautious with him making sure he always puts one on but my period is irregular so even before having sex I have not had my period so it's been about maybe a month and a half since I last had it so I can't calculate whether I missed it or not but last Wednesday I noticed abdominal uncomfort like I would before my period and then last week off and on I've been feeling that stomach pain, I don't know if it's stress or possible pregnancy even though the condom didn't break and I'm not showing any other signs, I drank a lot two days ago and woke up nauseous so I'm not sure if it is just left over gas from that either because I was fine the days before that I'm just really anxious