Hi my period is now late for 8 days and I am on day 34 of my cycle which is strange for me as I usually get my period every 24/25th day. I've only recently started having sex with my boyfriend, about two weeks ago. We used a condom and he pulled out as he started to cum. I use an app to help me know when I'm getting my period and on that day it stated that it was unlikely to become pregnant as it was 7 days before my period was due. I am really concerned as my period is usually regular and I am only 15, I've been getting my period since I was 11. I have had stress the last couple of weeks but nothing major. Please help me as I am really concerned and stressed out about it not coming