Hi, I have been feeling sick the past few days, my heart rate has been 120 to 124 the past couple days, throwing up, chest pressure and tightness, headaches, low back pain, and cramping, I over sweat at night but am freezing, and have been shaky. I don't know what I should do?

Sounds like a flu or bad cold... but it cold be something worse. How are you feeling now? Have you seen a Doctor yet?