Sharp shooting pain on back left calf

For a good few weeks now I’ve been getting this sudden sharp shooting pain on the back left calf. Doesn’t matter what I am doing just comes on all of a sudden and brings me to a stop. Doesn’t last very long, no more than a minute but there is one part on the calf just an inch below the knee that if you touch it sends a shooting pain up my leg. This also goes away and just comes for a while after the shooting pain. Days could go by that I don’t get it but it’s becoming more frequent. I am a 38 year old female, fairly active person. Any advice would be great!