Hi and welcome to the GERD forum.
I agree with the above poster you need to contact your Dr.....not sure what you meant by ( I can no longer see)....do you mean that Dr?....
As for the abdominal pain....have you had regular bowel movements? This can cause not only abdominal pain but back pains as well...and also cause you to be lethargic as well.
Since you have had sinus issues for a time...if your Dr feels you need meds maybe switching to a H2b instead of a PPI would be better for you...talk with your Dr.
Hello! I would recommend contacting the doctor, if you are experiencing side effects. Of course, if you're experiencing severe reactions to the drug, stop use and seek immediate medical attention. There are many different medications for GERD, some of them are OTC. I hope you feel better soon!