I hope I don't have a stress fracture in my left leg

Every now and then I'll get a tinge of pain just below my knee on my shin. Happens when I rest mostly. Comes and goes. You'll feel it off and on one day then nothing for ages. Like a dull ache. There was a point in time I was working a ton and had like 3 or 4 hours of rest time between 8 hour shifts for awhile. Maybe that's what did it. I'm keeping an eye on it.