No period?

So this month I haven't had a period, well I was due on the 12th, and nothing. I have really really sore breasts, my stomach occasionally gets period cramps and I'm covered in acne in the chin/cheek area. I'm a virgin. For the past two weeks I have been really stressed out, like more than ever. Just wondering is this normal? Have I skipped it due to stress but I still have all the symptoms I'm just not bleeding? I'm really confused. Thanks for any help!!