So I have been off a high dose of northistrone for 2 weeks with nothing and now I have very light bleeding like not all the time but a lot lighter than normal, I also have bigger boobs that have been really sensitive and sore and needing to pee a lot. Any chance it could be implantation bleeding and cramps and that I could be pregnant. Or is it my period coming back ? I have done a test last night and it looked negative it was first response as I think I was getting evaporation lines with clear blue. I have also had unprotected sex 5 times since coming off my pills. Any help would be appreciated