lice problem.?

ok. i came over my friends house. but we didnt know she had lice. a girl in our school in her class (shes not in the same class as me) had lice and sat next to her. and friday was the last day of skool till feb vaca so she must have gotten it from her. and mii head isnt that itchy i think im just itching it just for the thought of it. my dadd and mom checked my hair. they said i had nothing but idk. when my friends parents checked her hair cuz it was itching like hell they didnt see anything at first but then they did. im rly scared. and wen i came over her house i was kinda attacing her and pulling her hair and all and we were jumping ontop of eachother. is it possibal to still not have lice. my friend found out she had lice just today
im soooooo scared i feel like i will die! =O

Question posted courtesy of: Headlice Treatment