Help? Lol

Okay. Let me start off with. If I do by chance end up actually pregnant it will be alright. But I do need opinions as I cant talk to my mom about this. My boyfriend and I had sex on the 8th of this month which was cycle day 15 for me and <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> said I was 2 days away from my fertile window and that "today I ovulate". Well, obviously we had sex that was already established and we think but arent sure he may have gotten a little cum inside.. to the point we were both curious so we tried to push/dig it out 😂😂 anyways we didnt find anything that was obviously cum so we didnt know. But the last 2 days.. Not today.. he kept saying things like "hey prego" so it's like. Does he know something I dont? I feel as if I've maybe had some of the symptoms of early pregnancy however that could be my mind being overly worried and just tricking me into thinking I may be. Those symptoms include nausea after eating, random like pressure below like my belly button area, seriously forgetful.. just basic stuff that could be debunked. Has anything similar happened to anyone else? When is the earliest I could test? My period is expected to come on the 24/25th of this month.