On occassion I experience a pain that seem to start in my upper/center back near my neck, then quickly turns into pressure on my chest that then leads to numbness in my left arm and my left hand gets very cold. The pain becomes very intense and lying down makes it a lot worse. Heart rate remains normal throughout and the only relief is ONLY ASPIRIN. Not ibuprofen or acetaminophen... What the heck is going on! Neck or spinal misalignment or something else???