what togg are you using?
flanelette sheets also help, theyre so cosy, and you can get warm pj's and you'll be roasting lol, Matalan are selling cosy fleeced jammy trousers for �6
While I was in hospital last year my brother bought me a feather quilt and i've never been so warm even on freezing nights, as soon as I get in bed I can feel the warmth, and to think I've been buying the ordinary ones all these years!