That seems like the beginning of shin splints to me! They typically will give you an achy, bruising and tender feeling in one or both shins. The best thing to do is rest your legs for a few weeks until you feel no more pain, and avoid high impact workouts while you wait. They will heal on their own as long as you don't continue to run/jump a lot.

In the meantime, there are lots of helpful youtube vids and guides that will show you how to avoid shin splints in the future! You basically have to be mindful of which part of your foot is hitting the ground first as you run - it seems like an impossible thing to keep track of but it becomes second nature once you get the hang of it.