Part of the issue with juice and your gi is the extra weight. It can cause a slight herniated esophagus.
What you have to do is do what is said above and get on some Prilosec. Don't drink OJ, liquid l carnitine, or any other acidic foods.
Also I'm going to give you a sweet hint that totally fucking sux but it works awesome. Drink a baking soda water mix. Just a little one. Like 1/3 tbs soda and like 2 cups water. It tastes like shit and will make you gag but it will crush your hearburn.
It neutralizes a ton of the excess acid in your stomach. This acid comes up due to your gi filling up and pushing your stomach closer to your esophagus.
I remember waking up a d feeling like hcl was being dumped down my throat!
No more my friends. The bigger you get the worse it gets.
Try it. It will work.