Still not sure whether I have CFS so two days ago I went for two long walks. One was an hour long the other 40 minutes, was up about 15 hours altogether. Didn't sleep well that night at all but ok ish the next day. Walked again the same durations. Slept really badly that night. The next day was ok until one o'clock pm then felt tired. By six pm my triceps, biceps, and thighs ached and I had the beginning of a headache. Had a bath plus two OTC painkillers. Symptoms reduced massively. Slept badly last night but have no body aches this morning Should add that I am wondering if I have gradual onset CFS and symptoms will get worse Symtoms started in January and seem to be getting worse bit this could be because of lack of sleep.