I Changed From Benicar To Losartan Potassium 100 Mg In

I changed from Benicar to Losartan Potassium 100 mg in 2015 because Medicare required this. I though am increasingly becoming fatigue, headaches, pain in the area of my kidneys, and I have developed Fybromyalgia and PMR in past few years (at same time I started blood pressure medicine, coincidentally). I am lalergic to so amy things, I have difficulty with all anti-inflammatory meds. Could the Losartan be causing my headaches and light headedness? Achy body? Feeling of sinus rhiunitis? Pain in Kidney area? I see my doctor in two weeks for check-up on my blood pressure, but appreciate any information you might have. Joyce