Can sleeping on your arm cause long term damage?

Friday night I drank way too much alcohol, and ped out. I woke up about 16 hours later, and my arm and fingers were partially numb (more like when it falls asleep) and it was hard to move. I could still move it, but I could barely pick up a can of coke, and all movements with it were pretty jerky. The next day my arm had more mobility, more strength, and the numbness had subsided to my forearm and thumb. Sunday, the numbness had subsided even less to only the radius side of my forearm and the tip of my thumb. Today, the numbness was only noticeable when something touched it, and the weakness was still there, just considerably less. I have had previous damage to my arm, breaking both my ulna and radius right above my wrist, and had to have pins inserted, one of them possibly went through or touched a nerve. I'm not sure if this is a neurological problem, or possible something more severe, like a clot or a small stroke.