laser hair removal experience

Anon
I got my first laser treatment yesterday. I did full Brazilian and under arms. My under arms and lower Brazilian was just a little pinch but the top part HOLY HELL that hurt! So I just had a few questions. When will I notice hair falling out? Right now I barely have stubble because I shaved before treatment. Also, how much of a reduction should i see after the first treatment? 10%? 20%?
Background I'm fair skinned I think they said skin type 2 and black very thick course body hair