"suspected fractured knee"

I went to hospital sat late afternoon with a suspected fractured knee...I have very little cartiledge left in my knees and 9/10 when I squat down to pick something up my knees lock almost as if they have dislodge.. This sat I squatted down and as I went to get back up my knees locked and did a really loud crunch as if I'd stomped on a bag orlf crisps..the pain was terrible and was not like the normal experience I feel when.they usually lock. So I went to a&e and explained what my condition is and what happend I was rudely spoken to by a nurse who said bluntly "/what are you expecting for me today what do u want..I asked for an xray as I couldn't walk my knee couldn't move and the pain was terrible. After the xray she said go home and go get checked out at doctors in a few days..I was disgusted I'm only 21 and she just palmed me of..3 days later I still can't walk and in pain. I've even had to borrow crutches from a friend. I know my own body and I know something is wrong with my knee and I can feel it too but she wouldn't listen ..she just rushed and sent me on my way..not impressed