hi there read your query this problem suggests a multitude of problem i will suggest a few investigations to help us reach the diagnosis treatment can be confirmed thereafter a. tsh, ft3, ft4- thyroid disorders can cause these kind of problems b. i am not sure about your age. so better to get a tmt done to make sure there is no cardiac condition developing c. fbs- sometimes such symptoms are present in undetected diabetes d. this could simply be a panic attack/claustrophobia- which we diagnose by ruling out other conditions, since we are online e. have your bp checked meanwhile take plenty of fluids. and stay in open spaces let us know the results best of luck dr.saumyamittal@gmail.com