I would go to gastrologist and have an endoscopy done. Whatever it is its probably your digestive system, Go to GNC get a good probiotic. I hope you feel better soon
that is most likely acid reflux. Sometimes I feel like I'm dying but I have a hiatal hernia that causes mine. My anxiety about my health makes it worse. Try natural remedies such as green leafy veggies, slippery elm, or apple cider vinegar, also yogurt is soothing and helps with digestion. Avoid coffee. And cantelope or bananas are great fruits to eat. Also exercising and meditations help with the anxiety. Hope you feel better.