Hi, just checking because I don't know if what I am feeling is heart related. 3 days of tightness in chest, pain in back directly behind heart area, today, felt fatigued walking the dog, dizzy. BP 144/72, generally is around 116/65. Indigestion? Have tried drinking coke, that's enough for me to be relieved, not now. Had to take an aleve at 2 am to ease the pain in my back so I could sleep. 2 Tylenol at 1:30 this aft. Hate to go to emerg if it's nothing. I do have lupus, and have had myocarditis before....???