I have recently developed similar problems myself. I am a 27 yr old male. Around 3 -4 weeks ago I developed stomach pain and complete loss of appetite that lasted for about 9-10 days. I currently take zegerid in the mornings which helps cause I usually have some nausea in the morning. Last night I thought I was having a heart attack as well. Sharp pain on the right side of my chest.
My stomach has also started to act up again, and I have lost my desire to eat. I never had any stomach or reflux problems in the past, but it appears I have them now. I just dont understand I guess. I would love to be able to enjoy food again, but I am losing hope. I am eating because I know I have to, not because I want to.