I am currently taking birth control and just recently switch generics. Every since I switched I noticed an increase in vaginal discharge; unlike what I normally have. At the beginning of my new pack my boyfriend and I had sex and the condom came off. I know I shouldn't had taken plan B with birth control but I went ahead anyway because of the recent increase in discharge. I experienced lower back pain within the first week of taking plan B as well as spotting. The stoping occurred about a week after taking the plan B and also showed up about 4 days later. Am I experiencing normal side effects to the pill? Or should I be concerned?