After I eat and do any physical activity I get a tightness and burning in my throat. It goes away when I stop. I have no trouble breathing during this time. Does anyone else have this?

It sounds like you might be experiencing a symptom related to gastroesophageal reflux disease (GERD), where stomach acid irritates the throat, especially after eating and physical activity. Another possibility could be a response to exercise-induced bronchoconstriction or even muscle tension in the throat area. It's not uncommon for others to experience similar sensations, but it’s important to consult a healthcare professional for a proper diagnosis and management.