My girlfriend had taken 3 Emergency Contraceptive pills since about the 15th of last month until now. She was on birth control pills throughout all those pills, EXCEPT for the last Ella pill. Since then, she had taken 3 pregnancy tests, the last one was taken this morning, and also came out negative. For the past few days, her stomach has been hurting daily, sometimes it hurts a lot for a short while then stops. She also has some head aches sometimes. But tonight, she called me and said her stomach was hurting really bad, I told her try to poop because it could just be that. She told me she couldn't, that's why she called me. Her stomach was hurting REALLY bad this time, I was on the phone with her the whole time. Any advice? What to do? What's wrong with her? Please, anything will help. She's 16 years old.