You def have gastritis and you may even have Pancreatitis. Go see a Dr. If you can’t afford it (I’m Aussie and we know healthcare isn’t cheap over there) then go get yourself a good reflux medication and some probiotics. Try and stay on a very bland diet (clear fluids would be best) for a few weeks and if it doesn’t improve you may need IV antibiotics and a couple days in hosp on IV fluids. We get pancreatitis patients in to ED pretty much every day with symptoms just like yours so don’t beat yourself up but learn something from this so you don’t do it again.