Missed period help..!!

So today marks 6 days missed on my period and I’m getting really nervous. Me and my boyfriend had sex on the 5th of November and today is the 26th, my period was suppose to start on the 20th and he keeps reassuring me that nothing happened on the 5th (we used protection and pulled out on top of it). I’ve taken 3 pregnancy test 2 during my missed period and 1 today, marking the last missed period duration day. I’m still in high school so it doesn’t put this situation at a calm. Any advice, the month ends Thursday the 30th.