I am just getting over the stomach flu where I was vomiting for around 6 hours and am having a hard time breathing.  There is a lot of pain in the upper part of my chest right below my collar bone.  I have shortness of breath, but it is painful to take a breath in.  Should I be worried or is it just a strain?
Hi thanks for asking question. As you have difficult breathing your case should be concerned. Here are few possibility.1. First as you had history of viral flu you might have viral respiratory infection like rhinitis, sore throat or bronchitis. Complete blood examination may reveal lymphocytes. Chest x-ray also helpful.2. Second if fever and cough associated then pneumonitis like cause has to be though and chest x-ray done for it. If cough productive and bacterial infection is under suspicion then antibiotic needed.3. Third you might muscular pain as a part of respiratory infection or by muscular strain. Pulmonary function test useful in differentiating restrictive or obstructive condition.4. If you have hypertension or diabetic then after ruling out resp. Cause still if diagnosis not clear electrocardiogram useful for ruling out cardiac causes. I hope my suggestion will helpful to you. Wish you good health.