Period?

I have been cramping for a couple days now. My period was supposed to start on the 30th and I have been bleeding here and there but never enough to feel a panty liner. My discharge is mostly light pink or brown. There were only a couple days it  was red. This is my first time on the pill. And I take it very well. The least action I had was a little bit of sex with a condom and I got fingered after I gave a bj and I highly doubt that any Precum got in me. I don't know what's going on this is my first time on birth control and I am very scared Idk what to do