Can you use a sleeping bag with a higher TOG?
What temp is the room and what tog bag are u using? My room is chilly at the min, 15 degrees or lower, so we're using a 3.5 tog with a sleepsuit and long sleeved vest!
We have a £50 thermostat controlled heater in his room set to 19 degrees at night
Have you tried the sleeping bags with arms? I think Next have a few or there's ones with arms and legs, more like a sleepsuit