Stressing

So I'm kind of stressing. When i was around 12 or 13 I was constantly bleeding the brownish pink blood/ discharge for 3 months straight. I got put on birth control to regulate my period. I am 20 years old now, I recently thought, hey why not stop my birth control and see if my period regulates itself now. I stopped the birth control in January and everything was fine at first. But for the last 2 weeks, I'm once again bleeding the brownish pink blood/discharge and now i am starting to have cramps. I'm stressing myself out about this because I'm thinking somethings wrong with me. Does anyone maybe have an answer?