No period

I’m in cycle day 40 no period ?? I’m a virgin I did stuff with my boyfriend before tho but I always get my period in sept I got my period the 16th and in October I got it the 20th and the months before that it usually comes on the first of the month but I haven’t gotten one this month ??! I took a pregnancy test November 10th and it came out negative 100% idk why I took it just because my stomach was hurting a little and then November 4th my bf ate me out and he nutted on the side of the leg on my right side and we wiped it up nothing got on my vag I’m pretty sure and we wiped everything up with a towel what if maybe some got on the cover and My bag touched it on the blanket and now I’m preg ? Idk my period just isn’t here and I’m scared because I didn’t get to experience sex .