To not understand these leg cramps?

[tinysleepy]

WTAF are leg cramps - is this an accurate description, or is something else going on?
I am post-menopausal (surgical menopause after total hysterectomy + ovaries. No HRT)

I get woken at night by this weird sensation, and wake up in the morning to the same feeling. It's not restless legs - it's a difference sensation.
It's pain & feels like that weak feeling you get in your knees when you get a real fright. It's not a contracting, excruciating pain (which is what I thought cramp was); it's a sickening throbbing pain.
Never get the pain in the day & FYI, I have fibromyalgia.
Is this leg cramps?

(I am honestly more articulate than this usually, but it's really hard to explain!)

Just to add; it's like the weakness you get in your legs with vertigo. If that makes sense?!

I get a sensation a bit like the feeling before your leg joes into cramp. It’s not nice but the gp thinks its a form of restless leg syndrome caused by extreme tiredness.

Definitely get properly checked out. I knew 2 people that had this and all of them were then diagnosed with cancer (All 3 are fine now and healthy this is not meant to alarm you) so please get checked out x

*3 people and all 3 are fine

No doesn’t sound like cramp to me. Cramp is where your muscle goes rigid, and the pain sort of crescendos, and you have to move the muscle in the opposite direction to get it to go.

No, not cramp. You'd usually get cramp in just one leg, it's muscular - the muscle contracts to such an extent that it feels rock hard, and you get out of it by pulling/pushing in the opposite direction, to forcibly extend it. But it's so intense in the leg that it's hard to get your brain round what you need to do.