Dealing with two big headaches on a Monday morning...breathe deeply and try to do something nice for yourself. These things will take time and several people here have given you the best advice and support from their experience.
I would just add that if you are the kind of person who likes to also have something in writing, there are several good websites. Here are three. You don't need to read every word!
Good info and FAQs:
http://www.headlice.org/Check out the Do's and Don'ts
http://www.kidshealth.org/parent/infections/common/lice.htmlGood luck!
Remember there is a 7-10 day incubation period, so re-check and treat, even if everything looks ok.
http://www.astdhpphe.org/infect/lice.html