I'm 15 and I made the foolish decision to have unprotected sex with my boyfriend on the 24th of August. I made sure he pulled out over 2 minutes before he was about to finish. I also told him to pee before we did it so the left over sperm would be flushed out in the precum. I was supposed to get my period on the 26th but now it's the 28th and I still haven't gotten it. I usually have a 25 or 26 day cycle but this is day 28 which is very rare for me. I am NOT on any form of birth control. I also had a serious bladder infection earlier in the month which I took medication for (Amoxicillin Tryhidrade) and I found out that that could be a reason why my period is late. I've also been having very bad period like cramps all day which I always have on the first and second day of my period but nothing's happening. I really need some help. I'm never having unprotected sex again cause I don't want to go through this fear again.