It's not scarlet fever, what is it?

I have swollen lymph nodes in the neck, more so on the right side, a recurring fever of 101.6f, loss of appetite, body aches, chills, and a rash contained solely to the naval area. My initial reaction upon research was to declare it scarlet fever, however scarlet fever involves a widespread rash centered around the chest and neck and in creases of joints. This is not the case here.