I also did a course of Accutane when I was younger, and was on Dianette (Diane where I'm from) for a long time. Came off it to have a baby - glowing pregnant skin! Back on it. Came off it to try for another, and after a year of indecision, the acne came back. It was definitely related to being off the pill.
Accutane is not a permanent solution for everyone, and often women with hormonal acne benefit more long term from anti-androgens like Diane.
In the end I did a second course and am back on the Diane. So far so good, but I get that staying on birth control long term is not a solution for everyone.
Just wanted to let you know that you are not alone.