Being pretty young (only 21) I make sure that I take as many precautions as I can to make sure to avoid pregnancy until I am ready. My boyfriend and I usually use condoms in addition to me being on the pill (I am really good about taking it within 2 hours of the scheduled time). With that being said we did not have a condom and decided we should be perfectly fine since I am on the pill and it was the day before I was supposed to get my period. Well, i never got my period and now I am 3 days late. I have bad cramps (feels like I'm going to get my period but still nothing), bad headaches (which is nothing uncommon), and very swollen breasts. I took a pregnancy test and it came back negative but since it is only 3 days since intercourse I doubt it would come up positive if I was. PLEASE HELP! Should I be worried??