Pharmacy switched me from Yasmin to Ocella?

Ever since I started my period at 13 I have had HORRIBLE cramps, and my cycle has always been irregular. 2 1/2 years ago I started birth Control and nothing seemed to help until my Dr prescribed me Yasmin (It worked wonders). a year ago I moved out of my parents house and was kicked off my dads insurance but I now I have a job that has wonderful benefits and decided to go back on Yasmin since I miss it so much and now have health insurance again. However when I went to the pharmacy today to pick it up they gave me Ocella instead. I've looked into it and Ocella is Yasmin's generic and they are made with the same ingredients. However I read millions of reviews of women who were switched from yasmin to Ocella and I cannot find ONE good review. What should I do, I don't want to take a medicine that will make my condition even worse.