Prilosec OTC and spikes

I started taking Prilosec OTC a month ago to treat GERD...just over a month ago. Very shortly after starting the medication, I noticed I was getting dull headaches and tension in my head that lasted throughout the day...not a migraine, but enough to be annoying. I also noticed as time went on that I have become very nervous/anxious, my heart rate jumps up easily, and now I am having blood pressure spikes that I never had before. I have seen that Omeprazole (similar drug) has caused similar problems in others, and even my doctor told me that the same class of drugs can cause similar problems. My GP is very suspicious, because all of this began after I took the drug. Even though I had slightly elevated Dr's office BP, it was never at current levels. And I cant sleep at night nearly as well, and that DEFINITELY started just after taking the meds. Anyone else experience this?? My Gastro Doctor is skeptical, but I think my GP DR thinks something is not right here and she suspects the medicine...