What Are The Side Effects Of Mylan Estradiol Patch?

I had a total hysterectomy 14 years ago and began using Vivelle dot .1 mg/day patch changing twice weekly.I have cut the patch back to 1/3 of its size and have used it successfully for several years. In January, I was given the Mylan Estradiol generic patch because the insurance company would only pay for the generic. I have used it over the past two months. For probably the last 30 years I have had symptoms of low blood sugar, which I can control with my diet. Since using the Mylan patch, these symptoms have gotten much more severe with a distinct heaviness/craving sensation in my chest. I am 53 years old and do not take any other medications but wearing the patch. After thinking about what had changed in my life, I realized the timing of the new patch and my strange increase in symptoms was the same. I still had a couple of Vivelle patches that I changed to this past week....strangely enough, no symptoms. Just need another opinion?