Hippy,
Don't beat yourself up for freaking out about the head lice! I would definitely freak out too. I have a phobia of anything that comes in the form of a swarm (to me that is more than 4 of the same little critter together) especially little bugs like fruit flies (I had a major panic attack over fruit flies once). But the good news is they will be gone soon. I think you did the right thing by making sure you got the sleep you need.