On december 11th i received a protected oral sex from a csw, it was brief 1 or 2 min. what are my risk from genital warts form this exposure.

Protected means ?: If the protection was working, the risk is tiny... call it 0% chance (mathematically rounding off). Of course, different people have differing ideas of what "protection" is, and how protected one must be before one uses the word "protected". Life is full of uncertainties... and spending time with sex workers just happens to be one of them.