Is this GERD

Try baking soda water to neutralize the acid to prevent damage to esophagus. Apple cider vinegar works well for some people. Whatever you can tolerate. Safe and cheap. 

I used to experience the same pain in shoulder blade area, usually right side.  I now have an extremely limited diet and it's gone. You can keep a food journal. Remember that some foods take up to 3 days to cause problems. 

The symptons you describe very much sounds like GERD, mostly: the increased heart rate is concerning, and right-side discomfort in addition to increased heard rate is a concerning symptom. You can try home remedies for GERD, but there’s no substitute to going to the doctor and getting checked out, in case it’s sometging else (or in addition). 

Here’s the thing with home remedies: they assume a single issue, and assume a single solution. But what happens if it’s something else? Eosinophilic Esophagitis, Esophageal Dysmotility, H. Pylori, gastritis, Barrett’s Esophagus can all have similar symptoms and each has wildly different treatments. (OK, so technically Barrett’s doesn’t have symptoms, but if it did, these would be it.) And they don’t have to happen inisolation: you can have more than one. 

This said, from personal experience, if you know you’re overweight, work on losing it. And the best way is really to reduce your caloric intake. (Exercise is great, but the best exercise for losing weight is putting down the fork.)  I know it’s not easy, but trust me when I say: 

1) every pound counts: GERD, heart disease, cancer, and a whole host of other issues are affected by weight. 

2) the longer you wait, the harder it gets. 

3) the longer you wait, the worse this will get. 

Personal history: I used to be 324lb. I’m currently at 200lb. I still need to lose about 25lb more. But even then, there’s a vast difference between how I felt then and how I feel now. 

Don’t take over the counter PPIs or aclis reducers: go see a doctor. In the meantime, acid neutralizers like baking soda water, calcium carbonate pills, and even things like Gaviscon will hell with symptoms. 

most likely it could be be GERD, Gastritis but Having been said Increase heart rate  ,chest pain radiating to neck ,overweight  better to go to Doctor  to Have ECG and cholestrol check   to make sure no heart issue and my previous experience  that syptoms can be present  like this in Gallbladder  inflamation .

but in order to out rule need full detail Hx  of present complaint  ,Family Hx , any medications u on .

hope it might help any question  happy to help

I had similar problems ( though i am slim) . Endoscopy found esophagitis, chronic gastritis, barretts esophagus... also had all the tests done for heart disease and coronary artery disease.....all came back normal. 

see a gastroenterologist.