Irregular period?

Me and my boyfriend have been dating for a little over a month now and we’ve been having a lot of sex. It’s either every night to multiple times a day. Recently it’s been quite a bit. I let him stay in me this time as he came and it’s the first time I’ve ever let anyone do that. I’ve usually always used protection so I’m scared I’m pregnant. now I’m almost two weeks late on my period. I took a test and it says I’m not but it’s not normal for me to be this late. My periods don’t usually come regularly but it’s never this long. Should I be concerned? Should I wait a few more days to take another test too? I’m scheduling a doctors appointment soon but I’m super scared to go and I don’t have a girl I’m close to to talk to this stuff about.