Coming off Yasmin

So I had to come off Yasmin as it was making me have about 12+ migraines a month! I stopped it in April and thankfully my migraines have settled down. But my periods are all over the place! I used to get one every 4 weeks with no irregularity, and from I stopped Yasmin it's been about every 5 weeks but very light and only lasting 1 day. It's now been 6 weeks 4 days from I last had one and I'm starting to worry! There's no way that I'm pregnant so what should I do?