In the meantime, try taking Activated Charcoal for the gas. You may have to take 5 at a time to get relief. Don't take if your on medication (cause it'll absorb that too). It is not a cure. But it might help with the symptoms.
I'm a nutritionist. God to a regular doctor. See if he can help you. If he can't, find a holistic dr that does a test called a Heidelberg Gastrogram (google this). And NEVER take antibiotics unless the doctor can first prove to you that you have some type of bacterial infection. Good luck!
could be lots of stuff,,,kidnet stones,,,gullbaldder issues,,,i dont think gas,,,thats not going to migrate into your back,,so its more serious then gas....sorry.
the hearburn issue could equal gastro issues,,,witch would back up the gullblader issues.
id say though,,no matter what if it continues to worsen,,go to the hospital asap,,,,no taking chanses on stuff like that.