Got a Cortisone shot in my knee & now I feel Terrible.?

I am a 23 year old amputee (lost my leg after getting hit by a car standing on the side of the road last year) & after a year of leg trouble I slipped off an icy curb and landed in a kneeling position on my bad leg/knee shattering my femur. After getting a rod in my femur & coming home, I realized a ton of pain was still in my knee. When I tried to turn in my sleep at night I would feel a sharp pop on my inner joint line & intense pain that follows to where I have to grab my knee & rotate it manually until the pain quells. This happens about 10x a day. I kept telling my doctor about the popping/clicking/pain & that my knee won't straighten or bend more than 35 degrees and he has blown it off as inflammation. I told him I thought my meniscus was torn and he told me there was no way that could have happened...??? Last I checked, landing so hard on you knee that your femur shatters & twisting it could have done it! I have so much metal in my knee that the MRI I had just looked like a glowing orb-you couldn't see anything. So he just gave me a shot of cortisone in the knee (OUCH!) & said I'll be fine. Today my knee hurts worse than ever, and I was immediately nauseous/lightheaded after that shot which has continued until today. He said if this doesn't work, he just wants to give me another shot? How does that make sense?! How do I get him to listen? What do I do?!?!?