I have been on the generic verions of the birth control Yaz for over 2 years, called Gianvi. Less than 2 months ago, CVS gave me Loryna, the other generic brand of Yaz, informing me it was the same thing. However, I've never had any side effects while taking Gianvi, but ever since I started Loryna, I have had a worsening in depression, terrible back pain and extremely heavy non-menstrual bleeding. Am I allowed to ask CVS to only give me Gianvi for the next refill? Also, is this heavy bleeding dangerous and should I seek medical attention? I currently am on no other medications and have no other health conditions.