Loss or lack of blood flow during sleep?

So i haven't always had the strongest heart, i got tall very fast during adolescence, and my nose if often blocked at night, to the point where it's hard to fall asleep a lot of nights because i can only breathe through my mouth. For a long time now, my limbs lost blood flow during sleep, sometimes my forearm, other times both my entire arms. I don't mean like ooh a tingly sensation, i mean like dead, i can't move them at all. The pain wakes me up. I've done a lot of stuff, my sleeping posture etc... but i move in my sleep so i can't really stop it. Lately my legs have been loosing blood flow, and I'll wake up to a dead foot or leg, i wasn't that worried, but recently I've been feeling like i was passed out/fainted while asleep, I brushed it off recently thinking i probably just slept badly. But I have passed out from lack of blood to the brain, and been in near drowning situations i know what it feels like after your brain suffers from lack of oxygen and blood, so this morning i was concerned when after having an all too realistic dream of suffocating and slowly loosing blood to my brain, i woke a while later, feeling like i had passed out/fainted, i have a headache but not the usual kind, my thoughts are loose, and my attention floats, i can't seem to focus properly, and I'm light headed, well basically everything i feel after i pass out or e.g. get up too quickly and loose my vision and balance and have to get the blood flowing back to the cerebrum before I stop being to able to use force in my limbs, despite not being able to feel them.

I don't think it's sleep apnea, because supposedly it wakes you up, but i feel like my circulation has been being cut off or restricted in my sleep recently, what could this be? Should i see a doctor right away or can i wait till COVID passes a bit?

Thanks in advance for any help.

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