Need help with shin splints

Hi yall! I wanted to see if anyone had remedies/stretches for shin splints. I just got new shoes over Christmas and in my training had no issues. A few weeks ago I could run 6 miles no issue but now I can barely run one without shooting pain in my shin and then having to walk. Any insight would be great as I’m running the half on 3/17 and getting a little nervous…appreciate ya!