Welcome to HCM
We understand your concerns
If the problem is not with heart and lungs and if your blood pressure is normal, then these symptoms direct the doubt towards psychic troubles or reflux disease. Gastric reflux
disease do create pain due to pressure on the diaphragm and eventually pushes it up. Explains pain and due to acidity, explains vomit. Simple body acidity symptoms converts into anxiety
if you don't take it lightly.
Have garlic and ginger along with food. You will be alright and I shall help you further online if you desire so.