Your experience sounds much like mine! I was on birth control for a similar eleven-year duration.
After stopping the pill, I had an immediate cycle (about 3-4 days after stopping, which lasted another 3-4 days), but then it took 37 days for me to get my first "true" period, and approximately 35-36 days for subsequent ones. Four months in, and it was only 30 days. I'm experiencing PMS right now (o hai thar, chocolate!) and if I start when I anticipate that I will, it would have been 30-31 days. Therefore, it took me about 3-4 months to regulate.
My face is calming down, as well. I had a nasty rash of acne on my forehead and chin immediately after, but it's down to just a couple spots now.
I also gained a few pounds as a result of birth control/cessation, and while it's since stabilized, it will take renewed effort to shed these unwanted pounds. Just a head's up on that; I'm not sure of other women have gained weight stopping contraception, but I did. (I was not eating in excess, either, as I am quite fastidious about tracking my intake.)
I'm also experiencing mid-cycle cramping during ovulation. Again, not sure how common that is, but that's just my experience.
On the upside, my libido is now like, "Yay! Sex!" and I'm feeling much more warmer and affectionate toward my mate. On the downside, the hormone fluctuations have triggered a spike in anxiety and carb cravings (probably linked!) which I have honored, in moderation. (Oh, hell, who am I kidding? I attacked and killed a jar of Nutella this morning and if it threatens me again, I will not hesitate to remind it who is in charge around here.)
Congrats on taking such an empowering step toward regaining your health! I hope your cycle sorts itself out soon. :)