If you cant get to dr's till monday then In the meantime make sure sheets are between your body and any Itchy blankets, as jenna said check for bedbugs, or If its bedmites then make sure you shake out your sheets and duvet daily and leave the bed exposed to get fresh air as well as open windows as this Ive heard keeps breeding down to a minimum, and maybe spray with a dettol water mix. If this is just down to itch skin my personal advice would be to make sure your getting enough fluids to rehydrate you from the inside, when bathing exfoliate your legs well to dislodge any dry dead skin and then whilst your legs are still wet use baby oil to lock In the moisture and see whether this solves your problem.