Hi Emily!
Of course without being a doctor I can't tell you for sure if that pain that is radiating down in the inside of your ankles is indeed shin splints----but it sure sounds like it. I am very familiar with this pain. If I'm not mistaken its sort of a dull ache that stays with you no matter what activity you do. Also when you press on it, it feels like a bruise thats on its way in or out.
If this is the pain that you have, then its usually a result of one or more of the following: 1) doing too much too soon, 2) a sudden change of activity, 3) a sudden change in floor surface, 4) a muscular imbalance 5) or either wearing a worn out shoe or a shoe that is inappropriate for the selected activity.
I recommend that you take a couple of days off(while you continue with ice, stretch, and ibuprofen)and then come back into the activity slowly, at half the intensity, and do it every other day. Slowly work your way back to your current level. Also, from here on out be sure that you do additional exercises for your calves to balance out a potential muscular imbalance between your tibialis anterior muscle(shin)and calf muscle(opposing muscle group). Good Luck!