Adolescence

I am having some issues with my hormones and acne lately. My background: I started menstruating when I was 15 years old and had really heavy week long periods, but they were irregular and did not come very often. When I was about 17 I started getting big pimples on my face, my Doctor at the time told me that it was because my periods were irregular and prescribed me Diane 35. It worked. I was on Diane for 5 years. The problem now: I am now almost 22. I went off Diane at the end of February and not including the initial period, I haven’t had one since (about 6 months!). I went off Diane because of fear of long term side effects, especially considering my mother’s history of estrogen dependent cancers (atypia cells in her breasts, and ovarian cancer). Since I went off the Diane, however, my skin has gotten extremely bad and I have severe acne concentrated on my chin. I am concerned for many reasons including that I am petite and worry about osteoporosis. I am tempted to go back on Diane 35 because it helped in so many respects, but again am apprehensive… Any suggestions you might have for me would be greatly appreciated.