Hi,

Yes It could be....pls try something for me.....palpate you tibia from the knee joint to your ankle. Do you feel pain on your medial site? If you do , it can be a shin splints (still, its very hard to give a right diagnose without seen you).
For you to figure out what you have and after fix is really hard, because we (PT) have to do an assessment to discover whats wrong with you...and this envolves more then your history.
I wouldn't discarted to stress fracture.....