first time having a cat with fleas, help!

Me and my boyfriend just got a new kitten and within the first five
minutes of seeing him i knew he had fleas. we bathed him in baby
shampoo and i comed him with a flea comb probibly like fifteen times
and i brought him to the vet the next day and she applied revolution(a
topical flea med)right in between his shoulder blades. so basically the
cat was in my house less than twenty four hours before he was treated
and i want to know how worried i should be about getting another out
break on the cat. I also vacumed and applied a flea powder to the areas
he was in mostley. I know im oerreacting a little but im completeley
freaked out i just want someone to let me know their first hand
expierence with revolution or any advice! it would be greatley
apprieciated thanks