Kyle, I am going to zoom in straight to the lice bit because I had such a horrid experience with them.
The other dbers are giving you great advice wrt to your W so I will just leave it.
If your D11 is infested, chances are your D5 will get reinfested. And it can take months to clear the problem.
Your D11 needs aggressive treatment. Can you get any prescribed meds from doctors and ask them for a more aggressive schedule? Clothes, beddings in the dryer or freezer. Daily combing with thick conditioner - nitty gritty comb is good. You can also use those flea combs for pets.
Good luck with the lice. They made my life hell for months.
You can call me Dory/ Grl.
As a wise fish once sang,"Just keep swimming!"
It's no use to go back to yesterday because I was a different person then.