Hi, Last nite woke 3am with severe ache in right side of chest. Never experienced any feeling like this, ached in waves, very uncomfortable. Later got kids to school, seemed to be dissipating but feeling starting going up neck, now resides in neck and right side of head, strange painful headache feeling. Not dizzy or short of breath but same aching pain in neck and head. Seems to lessen a little when I move around, won t cease tho. I am 48 female, history of heart issues but not diagnosed. Could this be a blood clot? I have 2 children and no one to watch them so I really don t need an emergency!