Waking up weird

Okayy so this is going to be hard to explain but il try i hope anywone knows what this might be

So yesterday i woke up around 4 am and i had yhe feeling i had to do somthing like solving a math problem or somthing(it was not really one thing and it was unsolvable) it was the only thing i could think about and i felt like i was being crushed together because i coudnt do it or somthing, i was still aware and could move but the memories are vage and i really want to know what it was and why it happend does anywone have an idea what this is, it took around 2 hours and then i could sleep again