Now, I am only 19 years old .. non smoker, rarely drink, i'm really a pretty healthy person. But cancer is my worst fear and I often think about it. I was recently hospitalized for a crazy virus that the doctor couldn't figure out what it was! I was vomiting, dizzy, dehydrated, my body went numb, and every time i swallowed i felt like there was a rock in my throat. he put me on anti biotics so the infection is pretty much gone .. but they did take a blood test for mono and found out i had no mono .. if i were to have cancer, would it have shown up in the blood test?