Fleas or Head Lice?

I am an animal lover. About 3 months ago, my neighbors went on vacation (please be patient, it's relevant to the type of person I am) and stuck a collar and tag on their cat. I started feeding the kitty, and about a month in, I noticed he is declawed, with a bell on his collar. I got worried, I do volunteer work at my local shelter. The "kitty" couldn't hunt, or anything (I was feeding him daily, but only once, per what I could afford.) At first, I felt OK with this "unspoken arrangement" until I learned he was declawed!

So, I immediately took him in. (I have 2 cats, 1 male, 5 years old and a female about 1.5 years old. They never go outside in spring and fall I treat my 2 with Pet Armor.) I have never had a flea problem doing this regimen.

The next day, even though they didn't need it, I dosed the cats with the flea medicine. The neighbors have, after the 3 months of my taking care of their cat. (There was not even a thank you, just a "he must've gotten the fleas outside, we don't have fleas" statement!) I treated all 3 cats, at my expense. (I wanted to place the cat away from his negligent owners, but no luck. I had to return him. He was in my window, they could see him). After the treatment, I treated again 30 days later.

Now I am experiencing troubles with fleas. I continue to treat, per directions, but tonight I found a bug by my ear. At first, I thought it's just an itch, I scratched. Just a moment later, the same area "tickled" again. This time I assumed it was a flea and instead of scratching, pitched and grabbed. It was a bug, but only half. Now about 10 years ago my daughter brought home lice. How can I tell what is which? She is still in school and has elementary school age step sisters.

Even after a 4th treatment my cats still scratch. I vacuumed daily. Will lice medicine kill fleas? This bug was by my ear! I don't know what to do. This is so embarrassing.

By bug unfriendly