Feeling cold

Tonight have had to go to bed with hotwater bottles etc to get warm thats despite turning the central heating on and sitting infront of gas fire . I just cannot get warm . Doesnt bode well for the heating bills this winter . I am under 65 so dont get help with warm home discount etc . Also on contributary esa so no entitlement there . Am applying for pip but not that confident in getting it but not sure if did get it that would make me entitled to help with heating