Hello Doctor, I'm a 19 year old female. I had my last period two weeks ago, and had sex one week ago. There were moments where we used a condom and others where we didn't. I felt fine the first few days after having sex but after Friday i started having white discharge that stained my panties, diarrhea and cramps. I also have gastritis as a result of a weekend of bad drinking so to add to the symptoms list i have a lot of heartburn and nausea. My lower abdomen feels extremely heavy and there are some instances in which i feel really weak. I'm a fairly normal girl, i get my period every 28-30 days, but after this past weekend could i be pregnant, and be having this symptoms this soon? Is it something else entirely? Or is it all mental?