Scared I’m pregnant please read and help me out

So me and my boyfriend had sex and this app said i was ovulating and i know people say it’s not completely accurate, i had creamy discharge but we had sex a lot because he stayed saturday-tuesday and we used a condom but on monday night he told me to stop riding because he was about to cum (he pulls out even with a condom on) i got up and the condom wasn’t there then we realized it was in my vagina, my boyfriend wasn’t sure if he came in me or not because he thought the condom was on so he wasn’t super worried about pulling out but he’s almost positive he didn’t cum in me, when we got the condom out we looked at the condom and it didn’t look like it had cum on it (we assume it would have cum on it since it was in me if he accidentally came in me) it just had a little watery white stuff on it but we think it was from me and the lube from the condom i peed right after and put a towel in water and wiped... i got prescribed birth control about a week ago and was gonna wait until my next period to start it but i started it yesterday (tuesday, the day my boyfriend left my house) because of what happened monday night... i know it’s not an emergency contraceptive and it’s not effective until like 7 days after you start it but i cant afford to get a plan b or anything like that, does anyone know what i should do or if you think i’d know if he came in me (i don’t know what it feels like or if there’s a feeling) my period is in 9 days and i know starting birth control can make it late but i know i’ll be freaking out if it’s late after this incident, so if anyone has any information or things that could help me please let me know and don’t be mean in the comments, thank you.