I have profound burning pain next just above and to the right of my
sternum if I do not treat my sinusitis.
I have found that both tend to clear up  when I am taking
clyndiamycian, and it clears up faster if i also take prilosec with
it.
Clyndiamycian is a pretty broad spectrum antibiotic, and the
combination of opramazole and clyndiamycian is prescribed for h
pylori. Staph and mycobacteria and e-coli are all affected by it
bacause it interfers with biofilm formation, so the fact that my
condition responds to it does not identify the agent, only makes it
likely that it is bacterially caused. And the fact that Texas Pete hot
sauce, orange juice and vitamin C make it better also tends to
indicate that direction. (Recent lab tests identified staph with the
same sensitivity profile vs antibiotics as stuff I have had for at
least 8 years. It is sensitive to everything other than penicillin. If
it were not protected, it would be dead. )

But if you think that you may have some other cause of acid reflux,
then treat it as acid reflux due to allergy or something is the cause,
and see if it gets better.
Pepto bismol is a good bet because it treats acid and the bugs mistake
bismuth for some other metal that they need, so it has antibacterial
properties.
If treating the reflux as the problem does not work, then treat it as
a sinus infection.

I know my ENT has gradually come around to the notion that reflux can
cause chronic sinusitis in adults.  (In medical school they still teach
that this happens only with small children.)  He has seen adult patients
improve their sinusitis dramatically after having the Nissen
fundoplication procedure to tighten their esophageal sphincters.  (He
has NOT seen similar improvement with anti-acid medication, suggesting
that it's the physical contents of the stomach, not its pH, that's the
culprit.)

http://en.wikipedia.org/wiki/Nissen_fundoplication

What can I say?  It's one more theory of chronic sinusitis, along with
the other six dozen theories we've heard.

BTW, sinusitis that causes infected post nasal drip that is swallowed
can cause stomach upset and reflux, so it works both ways.

I have to sleep on my left side with a wedge pillow. Then I do not have
that relux when I wake up in the mornings.. I can do without Prilosec
for it which my MD recommened me to take.

I keep away from acidic foods before bedtime.

shirleyann