I feel your pain!!! Been there, done that and OH CRUD, doing it again as I write this note. Keep checking your daughter (especially around her ears and at the nape of her neck) but before you do the "poison", try this. Buy a nit comb, shampoo your daughters hair, towel it dry and then saturate it with conditioner. Separate the hair into TINY sections and comb through with the nit comb, rinsing it in a bowl of water (I like a white plastic bowl becuase you can see what comes off the comb) and periodically wiping comb on paper towel. If there are nits, this will help get them out without using the poison.
If you do find nits or live bugs, then treat with the pediculide. My trick (gonna do it tonight) is every other night for 7-10 days after using the poison I do the conditioner comb through. Then treat again with the poison on by day 10. Also, wash all the bedding after the first treatment plus all towels, any stuffed toys your daughter favors AND any hooded shirts/jackets, etc. AND, vacuum your house like crazy then throw away the vacuum cleaner bag.
We are in the thick of it now with my 7 year old daughter and I am going to comb thru myself today because I am getting paranoid. She gave it to me over the Summer so I am worried now and let me tell you, I have a thick head of hair. UGH!!
Good luck. It is a pain in the neck to deal with but it could be something far more devastating! I am also going to buy something called fairy tails today. Apparently they make a hair spritzy product (all natural) that the louse do not like. I am hoping daily usage on my little princess will keep her lice free for the rest of the school year - and the rest of my house too!