MY STORY. PLEASE HELP ME (post hyperpigmentation?)?

Before I went on birth control about 5 months ago, my skin was very clear with the occasional pimple. However, after going on birth control i got little bumps on my forehead and lots of acne on my chin and on one cheek. I tried several different birth control pills and they all made me break out, so about two months ago, i went off the pill. My acne has subsided a lot except I have all these red marks from acne leftover and i still have some bumps on my forehead. what should i do?