Over the last 3 months, I have had 15-20 episodes of sudden-onset (within a minute or so) of extreme exhaustion. The episodes usually occur in the heat (but many times I have spent long hours in the heat with no episode). It is a sudden, overwhelming fatigue that requires me to lay down for 2 hours or more (the longest was 6 hours) before I feel up to par again.

My doctor has run tests for thyroid, diabetes, sed rate, etc. I also had a stress test on my heart. All were normal.

The episodes continue. I am only 40, and this just started 3 months ago. I'm beginning to think maybe it's the early stages of menopause? Any help or suggestions would be appreciated!