Hello Cubagirl
I've just read your post and thought I should respond.
Have you ever heard of Alice in Wonderland migraine? Sounds ridiculous I know but google it: there are some comprehensive links and some less so. I suffered with these as a child as did my daughter: I understand they can hit at any age.
The most common symptom, that of perceived increased body size, didn't apply to either of us. The whole episode and feeling is very hard to describe. It is totally weird and it's hard to put your finger on it. My daughter had very similar experiences to me.
Let me try to describe it;
It used to hit both of us at bedtime though my daughter had 'attacks' at other times too. We were frightened by it, it was like being in a surreal situation with things looming and moving slowly and in a pulsating way, sound pulsating too and getting louder and almost echoey, sounds that actually weren't there. More than anything else though, it was just a very weird surreal feeling that couldn't easily be described. The classic migraine auras, i.e. tingling, headache etc could follow but infrequently.
My parents always thought I'd been dreaming, having a nightmare, and I remember the frustration when they didn't believe I was awake not asleep. I remember too the frustration at trying to describe what I'd experienced. When my daughter started getting them I knew immediately what she was experiencing. By that stage in my life I was suffering from migraine brought on by peri and I discussed this with a specialist who was treating me. She explained that it was Alice in Wonderland migraine, though I think it had a medical label.
Of course this may be a million miles away from what you're experiencing but it rang an immediate bell when I read your post. It was explained that they are harmless, often don't result in a headache, can happen multiple times a day for some people (we only got ours very occasionally), and can be triggered by stress, hormones or have recognised or unknown triggers.
As a child I thought I was going crazy, as did my poor daughter when they first happened. They are not pleasant!
I wish you well.
