The tip of my iguanas tail is starting to fall off!!! help@!?!? pics included!?

It looks like she swatted something with her tail and snapped it. This does happen alot with lizards that tail whip. It will get hard and fall off, I would keep some styptic powder around just in case she hits it again. Make sure that her cage is longer and wider then she is to avoid things like that. No ER is needed.