I have started feeling weird nerve sensations in hands/feet, please help

I have recently started experiencing random stinging pains in random places on my body. Like a tiny bee-sting but I feel it on the inside. The other thing is that I get these weird crawling/cold feelings in my hands and feet, more in my left hand. Sometimes I feel it in my arms too. I don’t know if this is from a pinched nerve or what.

My doctor told me it was from hyperventilation syndrome which causes tingling in the hands and feet, but what I experience isn’t tingling, like when your foot falls asleep. What I experience is like my hands and feet are suddenly freezing, but it’s a weird kind of freezing it’s hard to explain. Can anyone help? How do I lessen these sensations or make them go away? I have yet to see a neurologist.