Go to a health food store and buy some neem oil. Or order it online (ebay, amazon, whatever). You want 100% pure neem oil - at least 4 ounces. It doesn't go bad. Neem is a totally natural oil that is an amazing insecticide and does not hurt people at ALL. It doesn't hurt dogs, cats, other animals or the environment. It is also FAR more effective and cost effective than ANY other flea treatment I have found. Even better than the frontline stuff that you get from the vet.
It smells pretty yucky, but it is not a big deal. To use the neem oil, mix about 1 teaspoon into enough shampoo to wash her hair. then put the shampoo/neem oil on her head, rub like you are shampooing and make sure to get it all the way to the scalp. Let it sit for about 5 min, then rinse off.
If this is fleas, it will take care of it. If it is lice, this will take care of it. If this is some other bug, this will also take care of it. I am not sure about bedbugs, but only because I haven't looked.
The smell of the shampoo will probably be enough to mask the smell of the neem. It is ok to condition after using the need shampoo. If you are going to comb out lice eggs, mix some neem with the conditioner and then comb. Neem keeps eggs from hatching. My kids and niece say it hurts a lot less to comb them out after using neem than after any other product - even better than that commercal stuff sold to get the eggs to not be glued to the hair. Until we tried neem it used to take TWO people to hold thank you down and them me to comb out the nits. With neem? Just me - no holding him still/down/whatever.
For the house, including bedding, vacuum everything you can. Then spray a mixture of one tablespoon neem oil and 16 ounces of water on everything. If the odor of the neem oil is a problem (a strong, almost garlicky odor but not that bad when diluted), add a few drops of essential oil. We usually add citronella oil, mostly because I have a big bottle that I got on sale years back. ANY essential oil might be the ehelp you need though.
You do have to check the hair, and should repeat the process in about 10-14 days (can't remember when it is recommended).