I mean you really should go see a doctor tbh

Sounds like a night terror. If it's just that, then it isn't a health issue. But sleep apnea is actually serious, and you should definitely see a doctor about it. Plus, once you clear that issue up, you'll sleep better and will feel better overall.

Not at all a substitute for seeing a doc, but in the meantime maybe start regularly checking your blood pressure and spo2. Then when you do go to the doc you can show them your recent history.

Dude, this isn't something to fuck with.

The symptoms you're describing are very much a sign of heart disease worsening. Do not fuck around, get medical care. If you have to suck dick to get the money, suck that dick, I'm not even joking.

This will not go away on its own, and I've seen people die from refusing to act early enough.

Do not fuck around with this.

Could be heart problems, blood clots, stroke, or neurological issues, or even just psychological but you should really get the first ones checked out, like today

Did you take any sleep aids or other drugs before bed? For example, many sleep aids are CNS depressants which relax your muscles and affect your breathing, so you can end up not getting enough oxygen especially with existing sleep apnoea. They also can also reduce how much you support your own weight while you're asleep, which I've experienced as waking up with numb limbs because I slept in such a position as to cut off blood flow.

Do you sleep on the arm that gets numb? I remember reading that usually the body tries prevent loss of circulation and nerve pinching during sleep by jolting you awake so you move a little. Maybe you don't move enough during sleep and you brain has to resort to more extreme measures to prevent damaging you limb. Maybe try doubling up on pillows so there's less chance to pinch of your arm.