Why can't I sleep when I'm so exhausted?

[Guest guest]

Does anyone else find that even though they are barely able to move and

feel shattered, they aren't able to sleep?

I am finding that all I want to do is catch a sleep during the day, but

when I am able to I just end up lying there with my heart pounding as

if I'm nervous! I

I've had it a couple of times at night too lately, but usually during

the day. Is this to do with the hypothyroid?

Thanks

Leah x