me and my boyfriend had sex last week( both our first times) 4 times and used a condom each time. the last time i had sex was 4 days before my period, i was already getting pms, (sore breasts, tiredness, as i usually do) and it was supposed to come yesterday but i didnt get it, just some cramps. i am too scared to buy a test, but i know everyone is going to tell me to get one. but my question is is that is it normal for you to miss or have a late period after the firstt time having sex?