I am an 18 year old female and a virgin. My last period started on November 29th and ended about a week later, which at that point I hooked up with a guy on my floor. We didn't have sex, but he did have his penis on my vagina and then proceeded to finger me. Could I be pregnant? I have nausea and headaches and get pretty tired and have somewhat bad indigestion/constipation, but I don't have the tender breasts and stuff. I'm just worried because my period is supposed to come soon and hasn't so far.