Im Scared..Will I get chicken pox now? plz help!!?

soo, my frnd has mild chicken pox...like just one on the nose (poor thing) and a few on arms..which were under her sleeve..i was with her yesterday at school for a long time...and today she told us she had chiken pox n she was not feelin quite good...we told her to go homee but she din't listen..she was with us all the time...we tried to maintain some distance from her but when we were playin games she was close 2 me and even in cl she was sittin rite in front of me..after i came from school, i immedietly took a bath but im not satisfied..im feelin a itchy (i know im feelin bcoz im thinkin about it)...i think the incubation period is 8 - 12 day but im a lil weak n catch diseases very frequently..plz! i dont want chiccken pox now! will u give me some precautions and a few tips for prevention? and oh, my frnd is on a leave from 2moro so im kinda safe...sorry 4 such a long question! plz help me out!.oh, we also dint share anything like snacks or a drink..:P