I am 19 and a virgin but recently I have just experienced foreplay. I have never had sex but just recently my period was late and when it did come it was very light. I also experienced some cramping, frequent urination and tiredness. I have had exams but I didn't feel that overly stressed but I was very worried as I'm thinking of going on the Pill in order to have sex could my constant worrying and stress have caused it to be like this or could it be something else??