Sounds like your doctor knows you have a hormone imbalance (which is what your condition sounds like), because, you say, she gave you birth control pills -- although, "tetracycline" is an anti-biotic.

Having been through acne, I can speak from that experience and say you really ought to start with a darn good spring cleaning for your body!

Check out the "bowel cleaning forum" and the " Liver Flush Forum " in this website. The how-to information is all there. It'll take a little reading, and you'll probably want to look up things on line.

But then you can ask questions on the forums and get help (just like the rest of us).

Good luck!

Read up on zinc. It's used quite a bit in the treatment of acne. Severe Acne usually responds best to it. One 50mg a day is sufficient.
Something else to add - 200mg chromium, 400 IU Vit E
A B complex will help if you're worse during your cycle - if your triggers seem to be hormonal. I believe it's B6 that is giving good results for the hormonal end. Lots of people have had great success with B5 (Pantothenic Acid).

Definitely do some cleansing. I had excellent skin until I was about 22 - then all hell broke loose. I've done 7 or 8 Liver Flushes (900 stones give or take) I did the bowel cleansing, I did also just complete a 25 day master cleanse.
All of these cleanses left me with a barely there improvement - as far as clearing what was there. However, I wasn't getting anything new. My problem is cystic, and pretty isolated to my chin.

I read a book about the natural answer to OTC and prescription drugs, and the zinc/chromium/vit E was in there. There were a few other things, but I don't remember what they were.
I have only just recently started taking these in the mornings, it's been 4 or 5 days, and the improvement is enough that I can already tell the difference. I do have to get much better about drinking more water during the day - right now I'm about 10-15oz short of what I should be drinking.
If you'd like, I can track down the book again and post the section on the Acne treatments. Let me know.

Best of luck to you!