3 weeks ago my two last fingers of my left hand went numb, I was told it's pinged nerve in elbow. Then fingers became painful. Now, the whole hand.?

Ulnar neuropathy. Your symptoms appear, at first glance, to be an ulnar neuropathy. I share your concerns, however, if you are having symptoms in the rest of the hand as well. If you are having weakness in the hand, forearm or arm I would be concerned about a brachial plexopathy (injury to the network of nerves in the shoulder). I would discuss with your primary doctor, and consider a neurologist. Take Care!