Okay. I've had a mild fever for three days. Peaked at 105. I know I'm sick, but this is worrying me. Hospital time?

Any fever over 99F can be serious. You really shouldn't be treating yourself if it was 105F! That's very dangerous. It mostly hints at an underlying problem and this might be just the incubation period. I was down with malaria last yr and it caused violent fevers that were too high (same as yours 105). This can only be treated in a hospital so call the doc asap! Good luck!