Suggest An Alternative Medication For Vivelle Dot

Hi, I got my second box on substitute for Vivelle dot and I am being feeling miserable. I was doing so great with the vivelle dot for 1year and 7 months. I told the pharmacist about my side effects, but she said that the insurance does not cover the brand anymore, because now have the generic. I am very upset with this situation if it is not identical why the FDA approved. Hormone is not a joke. Took me so long to adjust my body and now I have to start all over again. Not fair. What should I do? Thanks for your help.