Bad advice, but from the supposed expert. I was having knee pain, my first step being to visit the Army troop clinic, where I saw a Lt. Colonel/MD who said he was an orthopedic specialist (I was a Major at the time, the next lower rank). He gave me cortisone injections into my left knee there in the clinic, not at the hospital. Horribly painful, I almost fainted at one point.
But the knee got worse and I couldn't do PT. A fellow officer knew another orthopedic surgeon at the main hospital's orthopedics department and got me a direct referral. He examined me and in turn had me see their full Colonel/MD department chief, who was very upset by the diagnosis & treatment the troop clinic doctor had given me, and confided that his office had been trying to bring malpractice charges against him.
The Lt. Col. was at the troop clinic (a place for general non-critical care) because he'd been booted out of the hospital's orthopedics, and been ordered not to practice any orthopedic work there. I hadn't known that previously, and the Colonel said my case might provide some hard evidence to make charges stick. By being misdiagnosed and the proper treatment delayed, while being told to keep exercising and running, which I did for several months, he said my knee joint had been made permanently worse.
In the meantime I was scheduled for knee surgery 3 days later by the Colonel himself. My knee never did fully heal, as predicted, and I was told I'd need a total joint replacement in a few years, but I've been avoiding it all this time, one of the reasons I walk with a cane. It's one of my rated VA disabilities at 20%.