Nd Yag laser hair removal first session - what to expect?

Indian skin with thick hair growth on my leg. I had my first session & was asked to shave the night before, my laser didn't hurt much & my legs didn't show enough redness, it was 1% of what I usually get after waxing! the shaved hair seems to be growing fast thicker! I was under the impression that the existing shaved hair grows very thin & fall off in a week's time! Pls let me know if its normal for the existing shaved hair to grow back really thick and no signs of them falling off after 1 week