So me and my boyfriend had sex on the day I was ovulating. I’m 99% sure we used protection (we normally do) However i’m 3 weeks late. I’ve taken 3 clearblue tests one on the 1 week mark and the others on the 2 week mark and today which is the 3 week mark I took 1 clearblue digital test. All tests say negative. I’ve just never been this late before ever and I don’t know what’s going on