Back in the gym

So I ran a 5k in late January and ever since the back of my left leg (upper towards my back) has been in a lot of pain. I don't know if I pulled something or not, but it was painful. I tried to workout after, but it was a no go. I waited patiently (not really..was dying to get back in the gym) and today was the first day I have been back. I did yoga since its calming (had a day from you know what) and its not intense. No pain!! My leg feels great. I think me and my boys are going to go for a short run tomorrow to see how it feels. I'll keep you updated :)