Hello, Woken up last night with a severe calf cramp at top of left calf. Seemed like a normal charlie horse, of which I have only had a couple in my life. Now about 12 hours later, there is a stabbing type pain at the lower calf. The pain has lessened over the last couple hours. I feel fine, and can walk unimpaired. The area is not bruised, and can move my foot without limitation. I had no injury or unusual physical activity yesterday. I have a desk job and have been here all day. Is this a concern?