Sorry to hear about your symptoms. Yes it certainly can be heartburn, and from you are describing maybe some food sensitivities as well. Does the pain and pressure occur after every meal? You may want to keep a detailed food diary, and keep track of your symptoms. I cannot tolerate any nuts or corn, because if I do eat them I get the gas and bloating and pain. I cant digest them. Also there are a number of PPIs out there, talk to your gastro about alternatives to prilosec. Anyway I hope this helps. Good luck with your classes. Take care.