Hello, and I hope I can help you today. If you got bleeding after your unprotected encounter, and took emergency contraception, and had a negative pregnancy test, you are not pregnant. Furthermore, the hormones in the birth control pills are what made your period shorter this month, which is a normal side-effect. Many of the side effects of birth control pills can also mimic pregnancy symptoms. So it is not unusual to have bloating, breast tenderness, and other symptoms women commonly associate with pregnancy, especially in the first month of being on the pill. Worrying about pregnancy also makes you notice certain symptoms that you may not have been paying attention to as much previously. So you do not need to worry about pregnancy as long as your pregnancy test was negative, and you are taking birth control pills. Your symptoms especially of breast tenderness generally get better after you have been on the birth control pills for at least 3 months. Cutting down on caffeine and salt in your last week of your pill pack can help to reduce these side effects. I hope I was able to adequately answer your question today and that this information was reassuring. Best wishes, Dr. Brown