I know that I've had fleas on my bed because a neighbor's cat had them and rubbed against my bare leg for a couple of minutes, and since that time I have found fleas and flea 'dirt' around and on my bed and at times felt being bit by them. I've seen the tell-tale line of bite marks on my legs and even arms and face. Could I just be imagining that there are flea pupae on several places of my skin--the crust-like stuff cannot be washed or rubbed off. If pupae do develop on my skin what can I do, with what likelihood of success, about it? Unfortunately, I live alone. Thanks