Total exhaustion

Until I had my cerebellum brain bleed in Sept 2013 I had no real conception of total exhaustion. At the  moment almost any physical or mental activity rapidly leave me in a state of near collapse - I get totally exhausted and I just have to rest to regain my strength and equilibrium. At night I sleep very well yet it is usually after breakfast that I feel really, really exhausted.  I guess people with MS and ME feel like this often, but it is very hard for others to appreciate. I hate being like this.  Being on the computer is one of the few activities that does not tire me.