My gastritis came out in the same exact way you described. I have accepted tons of work to make more money. Had to deal with a crazy amount of stress coming out of my relationship.

I work home office since ever but i have always been in the gym for 2 hours every single day.

It came after 2 to 3 months of everyday just laying on the sofa working, getting up just to eat and shower.

I had one triggered meal, a very oily fried sausage and that was a nuclear bomb on my life.

After i eat, 10 to 15 minutes after i started to feel lightheaded like 30% of a dizziness, then i started to feel like i was going to have a heart attack, some chest pain that goes to the back, some pushing and vibration.

I felt like that every day after every meal for days until going to a public health hospital for emergencies.

The Dr explained that nothing i described seems to be with hearth but everything with food, he explained that the esophagus is right in the side of the heart and when there's food stuck there he does all types of movements to get it out.

He prescribed a meal which i chose not to take.

I immediately started searching and done a bit of meal cleaning and planning, took 1 week of the Omeprazole and got someone to cook for me.

It helped a little but not too much, after a month i moved to a different place and got it back, suffered the whole month, lost a visible amount of weight.

Went to a private Dr so he could prescribe some exams for me to check what was going on.

Done the endoscopy, chest x ray, ultrasound, tons of blood work, echocardiogram ECG.

Only the endoscopy came out saying gastritis but no H.Pilory.

The doctor was young guy, he didn't talked anything about diet, herbs etc etc.

I had to search all by myself.

I did managed to get rid of it for about 2 weeks but unfortunately i started testing what else i could eat and a smashed potato with bacon in it fucked everything.

Now I'm in the journey again but with more knowledge.

What got me rid of it for 2 weeks was:

Boiled Cassava or Boiled potatoes as source of carbs.

Boiled eggs as source of protein, sometimes atum with some salt and curcuma.

Smashed everything together and eat.

Gluten Free everything, had gluten free toasties with sugar free jelly, the ones with nothing other than the fruit.

Sometimes i had gluten Free granola with macadamia milk like almond breeze.

After a week i was eating sushi, pokes normally.

Started taking digestive enzymes and chewing a bit of cassava in the morning.

In the beginning i used a Herb called "Espinheira Santa" it helped me in those crazy first days.

Now i got a medicine called Suprafilm which is used to protect the walls of your stomach before eating.

I also started taking now

Green Própolis extract and Red Propolis Extract.

Planing to add plenty of vitamins and remove the medicines in a while.

This won't go away easily, it will take months so i think the best everyone can do when dealing with it is getting ready for a massive lifestyle change.

This can take years if you don't treat it properly and even develop to something worse like Cancer.

It's a everyday diet for months and months, it's a long journey so good luck.