Dd just lost a tooth yesterday. We first discovered that the tooth was loose back last December during our holiday dinner. It took that long to lose it - almost 6 months. She had a couple of low-grade fevers in the meantime.
When you say "fever when losing", do you mean the very day it comes out? Because it's such a long, long process with dd that I can't even imagine being able to pinpoint even a given week or probably month when she's "losing" a tooth.
She's 8 and just lost her 4th tooth, so we're kind of behind on the teeth-losing front.