Please meet your doctor
Dont worry as this medication is not likely to cause cancer and is a safe drug. however you can develop some gastritis
and may need to consult your doctor for changing the drug!
There are better drugs available now, but these cannot be prescribed online, for this you have to meet your doctor or an allergy
specialist, who will examine you and order few blood tests and x rays and once the reports are ready, he can prescribe them for you.
Please dont ignore your complaints and dont worry about cancer!