Spotting??? Trauma???

At first I thought it was because my periods were irregular from stopping my birth control and my body had just dried the blood inside of me, so that when I fingered myself I'd bleed a little. I know that it's possible for periods to be dried out and I'm pretty sure that before I started taking my birth control that that's what it was. Once I started taking my birth control, there was no more blood when I fingered myself. I've been on my birth control again for about three months and I just fingered myself and bled more than I would before. I have about two weeks until I start taking my placebo pills. I'm probably not making any sense at all. But I'd really appreciate some input.