Hi Rosie,63.
I think it has got something to do with low estrogen.
I had terrible fatigue when I waiting for my hrt to kick in, and also my
hair on the left side has gone thinner then the right side.
The fatigue has gone now, but my hair is still the same, in fact I have it permed
to try and cover it up, as when it's straight it really stands out.
I'm no expert though but maybe someone knowledgeable will post.
But Salad is right too, maybe go and get your viti D checked.
Keep us posted, hope you feel better soon.
Jd x