hello im suffering from ansiety all my adult life . these past few months have been hell and all these visits to the ER and nothing . these past few weeks i been having pain on my neck ( like muscle pain and tense and ) , shoulders like in the joints is tender to the touch and it gets worse in the morning and it radiates on the top of chest like above the heart by the collar bone, i have been in the ER so many times and i had everything you cam do on the heart , blood work for every from coagulation test , blood clots, and brain and all normal i just check my blood presure and was not high at all 125/86 and pulse 94. i check it again and 112/57 . i do feel like a taco on my troath . they read my MRI w contrast and was normal no signs of stroke ever or aneyrism . they doctor is gonna sent me to a sleep/awake study to look for blockage in the neck and hormones , and zeigures . my cholesterol is in the high normal and im working on that to lower more. the bad ldl is low and the good one is high , triglydecures are normal. im gonna see a terapyst and hopefully give me something to control this feeling .
Good luck! It sounds like anxiety to me. All those tests showing nothing out of the normal…i think you will be ok 
im the same way I had a ct scan of my brain and still cant stop thinking brain tumor. Its not though. I just feel weak and lightheaded. But I know I need to move on from it. Just stay strong and a therapist should help.
im in the process right now im so streess my upper chest like above my breast and below the neck is tight , my neck , my top shoulders and the joints are in pain it is worse when i woke up.