These symptoms are not suggestive of fibromyalgia but it is important to check whether you have hemaoptysis(blood in sputum) or hematemesis( blood in vomitus). They can cause intercoastal myalgia. Myalgia means "muscle pain" and when it involves the intercostals muscles,it is called intercostal myalgia. Apply some cold compresses and take some anti inflammatory pain reliever like ibuprofen or diclofenac. Also apply topical muscle relaxant. If the condition improves,then it was intercostal myalgia,other wise conditions like costochondritis, anemia and thyroid diseases(hyperthyroidism),fibromyalgia, Ankylosing spondylitis and irritation of the nerves supplying the chest by buldging disc of cervical or thoracic vertebrae have to be explored. Also the cause for blood in vomitus/ sputum needs to be ascertained.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
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