I'm having trouble catching my breath when I am doing nothing I went too the ER 3 weeks ago my xrays came up clear I am not coughing or wheezing?

Many issues. Shortness of breath is someone under the age of thirty could be a sign of anxiety, related to a viral infection, related to anemia (low blood count) or thyroid disease. Further work up would includ blood work and a good physical exam by our health care provider.

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