I am having pain in my stomach when I eat and drink.  At first I thought it was due to being on a fast and then trying to eat solid foods but drinking water with lemon even hurts and  just eating yogurt and salad too.  It hurts like I either just been working out and it extremely sore or like Im being punched in the stomach.
Hi. This is due to acid-peptic -disease in a broader sense. You may have esophagitis / inflammation or ulcer formation in esophagus/ stomach / duodenum. This can be easily diagnosed by an upper GI Endoscopy. Get one done ASAP. The treatment can be started on the finding of the causative factor. Do not start Sanitizing or PPI before endoscopy as even a single dose can alter the findings on endoscopy. You can start Sanitizing, antacid gels and supportive treatment after an endoscopy or as may be directed by your treating Gastroenterologist.