pain on inside of leg

I'm not a doc, but it sounds like the posterior tibial tendon or posterior tibialas. Do a google search, and it might help you ID what the pain is and what to do for it (depending on how it's actually affecting you).

that's exactly what it is!! Thanks! I've had problems with this ankle before as I sprained, fractured, and torn ligaments(dont know which ones never cared enough at the time to see a dr). I wasnt sure at first but I looked at my ankle while walking around and saw that it is rolling in. I think the fact that I like to walk barefoot has pronounced the flatfoot effect as well. Looks like I'll be needing some ace bandages Thats not good at only age 21

I recommend you go to a good running store so they can point you in the direction of the appropriate shoe for your foot. If you tend to pronate, you should get a shoe that will help with that. Of course, make sure you let the problem heal first. If you don't want to go to the doc, rest it and ice it. When you get back to running, start out slow, making sure you remain pain-free throughout the runs. Build the volume back up slowly. And, make sure you're running in the proper shoes . Good luck.