as you said the problem could be your bed..might be an allergic reaction
of your skin to some allergan...do you get relief if you change bed,bed sheets,hot shower,any cream..
do you apply any cream take any pills before going to bed,how long is this problem,hows your skin any other complaints..
try changing the soap,detrgent,fabric softener,change bed sheet,palace of sleeping,use anti allergic moisturising cream in the night,,
see a doctor for further advice,,bye