I got the menstrual cycle blues

No Name • No Name Dame at your service
I went off of my birth control back at the end of April after being on a daily pill for almost three years, not only because I was experiencing 3 weeks worth of spotting and one week off each month, but also because I want to get away from using pharmaceuticals to control my body's natural functions (I'm lucky that I don't need it to regulate me or function somewhat normally)...
Here's the thing that is getting to me: my period is ALL kinds of messed up now. I usually had a 7 day cycle, now it's sometimes more and sometimes less. The last couple of months have been pretty unpredictable. It used to be every 21 days and now I have my second period this month after having been off of it for only 8 days.
Did anyone else notice some wonkiness after chucking their pill? Can I expect some regulation after a couple more months?