Hoping I'm not being stupid

The physical test is this Saturday. My tendon still screams at me when I do anything more than just walk. (But walking is almost entirely pain free.) To pass, I just need to successfully sprint, but my biggest fear is that I'll do permanent harm to my tendon. My 2nd dan is NOT worth a life time injury. Everything I've read implies I'm not putting myself at risk, but one never knows.

I'm completely afraid to go to the doctor to ask, too, because I'm sure he'll just tell me to lose weight and won't actually treat me.