Gas , acidity , and stomach infections

I am 24 years old having GERD,what ever i eat i feel inflamation and burning sensation in my stomach and every now and than i suffer from stomach infection, stomach infection tends to be more whenevr i eat at outside resturants. Gas, acidity and stomach infections are making my life hell.I am also having sticky stools.I have tried medicines like pentaprazole,amoxilin, and all but these problem are getting worst with each passing day.These days i am surviving on antibotics like metronidazole, amoxilin as i having constant stomach infection. i am loosing weight.I have given up hope. Tell me what to do?