Gastrictrouble and TSH. Give me advise!

I have been suffering from an embarrassing problem.i have noticed that gas is leaking from my back with out knowing to me.i understood this while travelling in a bus two months ago by whispering of co passengers.i took that lightly because on that day i ate heavy food before travelling.i used to take antibiotics few times that happen on journey time.after that i consult a doctor, he told me its stomach infection prescribed medicine and don't eat too spicy and gravy curries,non veg.i followed the same diet for a while problem is solved after using medicine for 5 days.but problem started in journey again.gas has been releasing from my back continuously with foul smell and then i used antibiotic and problem stopped and again started after few days .again i consulted a doctor i undergone after blood test and urine test .blood test showed high TSH. used tindazole for 10 days problem is almost solved.but on those days i went to bowl movement 3 to 4 times in a day .please give me advise