Hi.
Thanks for your query and an elucidate history.
You have a typical problem.
The mouth starting to salivate like feeling of
vomiting, pain after food and need to go for passing a motion -
diarrhea , gurgling all indicate that you have an inflammatory problem in the intestines.
This is a classical problem always forgotten .
I would advise you the following:
-Initially a 5 day course of an antibiotic,
metronidazole,
probiotic to see the results.
If no complete relief , then you have to undergo
CT scan of the abdomen and upper GI and lower GI Endoscopies ..
The further treatment will depend upon the diagnosis .
Please continue the medicines as you already have been taking as these medicines have no such complications .