Hi,im 27,female, and ive have been having exactly the same problems for 8 months now, I get a lot of pain and discomfort in my sternum/breastbone, and also just below it. When I eat, mostly when I have dinner in the evenings my food doesnt always feel like it is going down properly, it sits halfway down for a while and it feels like I need to burp and it will all come back up. Quite often I burp up watery stuff, sometimes sick and sometimes the food ive just eaten, not huge amounts but enough, and its not very nice! I also sometimes get a really heavy feeling in the bottom of my chest? Im always burping, I never used to and its really embarresing sometimes! Ive been to my gp and ive been on nexium for 6 months although it hasnt really helped. Ive had a barium swallow and that didnt show anything, my gp sent me to a consultant and he then sent me for an endoscopy examination, this also didnt show anything? Im waiting for a follow up appointment to see where I go from here? I know this information doesnt help you much but dont get your hopes up that an endoscopy will show the cause of the problem because it may not,as I found out, I hope you find an answer soon though because these symptoms are horrible and I sympathise with you having them as I to have been very uncomfortable for a long time now, with no answer for it? Good luck!