Head lice

Abba, please help Deidra and I to get rid of these things. Nothing over the counter seems to be working to get rid of them and Deidra has now passed them on to me. I feel disgusting and like everyone can see them. All Deidra and I have been doing is itching, itching, and itching and every time I think we've nipped them in the bud...they're back just a couple weeks later. The perscription the doctor wrote isn't covered under insurance and is $123 a bottle...just for some stinking shampoo. So, I just ordered some stuff online that someone said worked for them and I'm hoping that will do the trick...that alone was $54 so it better. I hate these little buggers.