Impossible Acne! h e l p

I've always struggled with acne (since sixth grade- and I'm graduating high school next year) and sometimes I get a few months where my hard work and experience with products pays off and my skin clears up, but it always returns in another form! I used to get whiteheads in random places but managed to eliminate those, and when I got older I got intensely painful cystic acne which I'm now on antibiotics for (which are rendered useless when I'm on my period anyways) and now I have these little bumps all over my chin and I've exhausted every trick I've learned but nothing is working. I'd really like to clear things up- and would deeply appreciate any short or long term solutions so that I can clear up my skin for my last year of highschool.