I need some advice please!?

DEFINITELY get a second opinion! I have terrible knee problems at 21 and I am convinced that the first orthopedic doctor was just being lazy because she just told me to work out more... well four months later and a lot of pain and ibuprofen after working out, i've still got nasty grinding with any movement of my knee and popping while climbing stairs. I'm going to a new doctor... you should too. cortisone doesn't work forever!