Mercury Thermometer Poisoning?

Okay, so I just accidently broke a mercury thermometer. I just broke the tip that goes in your mouth, though. It was gl and when it broke silvery liquid stuff came out. I'm pretty sure I didn't ingest any of it, thank god, but I'm still worried. If i did get any of it in my body it would have been a VERY little amount. Is there anything to worry about or am I blowing this way out of proportion? Thanks for the help!