Just diagnosed with GERD what should i do?

Hello.as of today I have just been diagnosed with GERD.I have pills I am now taking but I'm looking for anymore advice I can get.I wanted to cry just because I finally put a name to my terrible pain. As I type,I have a deep abdominal pain.I need advice.I see I need to lose weight.I'm 4'11. And I weight 110.I don't want to go under my weight that I should be but what diet should I be doing?what exercises? HELP! BEST ADVICE IS FROM THE EXPERIENCED. Anything will help.I'm only 20 I hope GERD is curable.