Eagle, please see a doctor immediately! You have just described all the symptoms of a heart attack - dizziness, fatigue, tightness in back/chest/etc. Please, please go get checked out, and have them check your blood levels and do a few heart tests, okay?

My accountant, who's 55, had your same sypmtoms except she had tightness in her neck. It never occurred to her that she was having a heart attack, but she was. All is well now, but her doctor said if she hadn't had it checked she could have died.

Please, please go first thing in the morning! Or even tonight if you can.
Kathy