Cannot keep food down for over a month. pressure on tongue at back of throat. unable to belch but desire to do so. stitch like pain in stomach.

Concerning: These symptoms are cause for concern. More data is needed but in the absence of prior surgery or significant chest trauma, things to consider are esophagitis, reflux disease with a structure, a hiatal hernia, peptic ulcer disease and so on. Chest X-ray and more importantly endoscopy to look at you esophagus and stomach would be helpful.