where are my fonts!?!?!?!?!?!

i just have update my OS and i just figure that all the fonts that i use for work (im a graphic designer!) has gone!!!!!!

THERES NO TRACE ABOUT THEM!!!! WHY?!!??!!?

this is not the first time i update software, i have everything from apple, and the thing that i loved about being a mac lover WAS the possibilities of upgrade whatever u want without losing information but it doesnt longer exist??!??!!?