You undoubtedly have acid reflux. You may have a hiatal hernia, which causes the little flap between your stomach and esophagus to open and close improperly. You should not eat anything after 8:00 pm and to prevent the stomach acid from backing up into the esophagus, raise the head of your bed up about two bricks high or one cement block high. If you feel as though you have a lot of acid, eat a couple pieces of plain bread. It will soak up the acid. Cut down on acidic things like soda pop, tomatoes, etc. The best pill for acid reflux is Nexium if you can get it. But for now, cut down any heavy late night eating, raise the head of the bed and you'll do fine. Eventually you may have to have surgery to repair the hernia. I wish for you the very best young lady and hope you can find out for sure the problem, and have great luck resting better.
My experience and opinion.