I had my period at the end of December, went a week without bleeding and then all of a sudde. For that last two and a half weeks I'll go days of just wiping and there's blood. To I need a pad then a few days where I don't bleed at all....... Then I start going back to wiping and there's blood. I've taken two negetive pregenecy tests and I don't know what's going on. Please help