We had the same problem, poor fred had little red marks everywyere I read somewhere that fleas don't like mint. So I got some mint leaves, crushed them up and put them in a spray bottle with hot water. I then sprayed the carpets, rugs and couches and mattresses and we haven't had any since then. That was about 4 months ago. It was really cheap easy and seems to have been really effective.

Hope you get rid of them soon