Can You Tell Me What Is Wrong W My Back?

can you tell me what is wrong w my back? Two days after doing planks, push-ups and plank jacks in bootcamp class i got a sharp burning pain in my back just under my left shoulder blade. along with this symptom I am getting a pain in my forearm, my left ring finger and pinkie go numb, i have loss of strength in my left hand and arm and multiple areas on my left side of my upper body twitch