Hi Alan so sorry you are still feeling rough, the Omeprazole will certainly help but my gut instinct
excuse the pun, as I have been through what you describe is to try and get an Endoscopy check.
At least it will either confirm or dismiss problems with your reflux problem.
I am also on Lansoprazole as
@SueEK has said and have been for 20 years with no reflux issues,
I used to burn so bad and as
@mikeydt1 said milk would stop it for a short period but 5 pints a day
got too much and my new doctor now my friend send me for an Endoscope test and it confirmed
three problems with my gullet (oesophagus) and my Doc was able to treat the problems immediately.
Relief at last, just mention if I laid on my left it was ok on the right end up being in so much pain and
vomiting, I`ve had four Endoscopy`s since and each time they increase the Lansoprazole.
Was warned off by the doc, I was on it recommended by the Consultant but two weeks later they
had a warning from the people who supply it, not for long term use.
My own experience my mate might be worth considering, take care stay safe man {{{HUGS}}}.