Wednesday (4/24) I was running faster then usual when my left calf tightened up and then kinda pulsed or spasmed a couple of times. I was unable to continue to run on it and it has continued to be painful through today. Walking on it doesn't hurt to much (but there is pain). Trying to run a step or two radiates sharp pain through out the calf. Any advice on what it could be or treatment would be appreciated, thanks.