Post dinner felt hot, less than 5 min. Nausea 40 min. Lump between shoulderblades. No chest pain or shortness of breath. Fear mi. Doc says heart ok.

Reflux/ spasm. The symptoms you describe could be due to stomach acid which would be expected to show up after eating. The acid can cause esophageal spasm and a feeling of a lump or pressure between the shoulder blades. Worst offenders for foods include acids like tomato, spicy food, alcohol, chocolate. Heart issues are less likely in a young female like yourself.