You can buy plastic coverings for your mattress and pillows at your local Walmart at a very cheap price, this is like the first thing you should do. The brochure says not to use your mattress for 48 hours past treatment, personally I would wait about 4 days minimum just to risk not getting reinfected. You should try getting some Borax for your carpeting also if you have some.

I would just get rid of it or use a plastic mattress that you can easily clean day to day. Most people get reinfested with scabies by their mattress, you can also do like me and get a permethrin spray to use on your mattress and garments, this will help prevent reinfection. Also if you have a steam cleaner it works wonders at helping you clean your environment, if you do not have one you should invest in one they are about 100$ and will last you years. You will thank me

You don't have to get rid of it, but certainly do not use it to sleep in for a couple weeks until you know you have completely eradicated scabies. Scabies are the worst mite for reinfestations because their life cycle and how quickly they produce eggs, the scabies mite also creates this film on the skin which helps protect them and their eggs. So the longer you feel you have had scabies the longer it will take to cure and you may need alternative treatments.

Hope this helps