I had the same thing 2years ago and I ignored it and ran through the pain, that was a bad idea.
I went to see a physio, I had shin splints, was wearing the wrong trainers.
This also put extra strain on my ankle, hamstrings and glutes the first major injury I have had and ended up missing a year of running so I cycled as it's less impact.
I would suggest seeing a physio, going to a running shop to check your wearing the correct trainers, find exercises to strengthen your leg muscles I hope this helps.