Omeprazole and constant headaches

I have been taking Omeprazole for only a coupe weeks, I just now figued out that it is causing me a lot of problems. My insurance also forced me to change. I was taking Previcid and doing well, but now they won't pay for it. I am suddenly having my fingers go numb, cramping excess gas and bloating, pain in my right side, most of my body is cover in a rash that itches, constant headaches, some dizziness. I went to the Dr. today and recieved a Predizone shot and prescription that was helping until I took another Omeprazole tonight. Thats how I know it is doing this to me. People need to be forwarned about this medicine.