That sounds like what I use to have !
I stomach ulce - peptic ulcer.
That treatment u r taking is no good. U need to be on a triple treatment which includes the medicine u r taking now plus antibiotic.
The antibiotic would be for the bacteria - pyroli.
Anyway, u really need to get your stomach checked through them cameras. I put up with them pains for 3 years !!!! Until 1 day I was passing out black colour faeces and vomiting blood which was a result from my stomach being pierced through by the ulcer !
Either way, get the camera check thing done !