I have acid reflux/indigestion all the time...?

I am going to a GI doctor on monday for a consultation to get an endoscopy and colonoscopy done... I am 22 years old and have been having this problem for a long time (probably since I was in like 4th grade maybe even younger)... I have been on medicines like zantac 75, omeprazole, pepcid, protonix, and nexium... I am currently on 40mg of nexium and i am still breaking through it with the acid reflux... I find myself taking lots and lots and lots of tums... it seems like anything i eat gives me reflux... Does anyone know any at home remedys that I can try in order to keep this at bay until i get a chance to see a doctor...?