Hi
Welcome to the MedHelp forum!
Tightness in throat with breathing difficulties can be due to obstructive lung diseases like asthma. It can also be due to allergic bronchitis. The other possibility is gastric reflux and acidity. Discuss this with your doctor. You may need some tests to reach final diagnosis. Hope this helps. Please let me know if there is any thing else and do keep me posted. Take care!
You should go to a physician who can order the appropriate testing to evaluate pulmonary function & get a medical history so they can prescribe the appropriat medication for you specifically.