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Hello, this is Dr. David. I am reviewing your question now and will be with you momentarily.
it sounds like you are worried about having a blood clot in your chest
you should get a pulmonary function test of your lungs by a pulmonologist
you can get a CT angiogram to check for blood clots in your lungs. this is rare, but if you are short of breath, that is one test to do.
do you have bad anxiety symptoms?
severe anxiety symptoms can cause symptoms of shortness of breath.
you should see a pulmonary doctor and get a pulmonary function test
did you smoke cigarettes before?
what is your height and weight?
calcified mediastinal lymph nodes are common as we get older and would not be causing your symptoms.
your BMI is elevated with your height and weight.
this can cause more shortness of breath symptoms.
you could have new onset allergic asthma which can cause shortness of breath
a peak flow measure of your airways and bronchodilators can see if this is going on
asthma inhalers, steroids, allergy medications can help open up airways and help you breath better.