Probiotics my friend. Sounds like a form of IBS.
You have a few options and unfortunately death is imminent, a slow death and you will probably live till 85 or 95. LOL
Anyway, take the capsule or plain yogurt. You can get this from any pharmacy and the yogurt from your spar etc.
If you mixing with milk, look at fat free and stay away from dairy.
Gas, pancreoflat (spelling) is the best.
Did not read the complete post so if I am off here, excuse me.