Dislocated knee cap?

I went to a jump place today and I was going to do a front flip when I took off to flip I felt my knee pop a little and give out, I finally pulled myself out the pit I jumped into and when I stood up and put weight on my knee I felt my knee cap go to the side I had to hold it to prevent it from moving then I tried... show more I went to a jump place today and I was going to do a front flip when I took off to flip I felt my knee pop a little and give out, I finally pulled myself out the pit I jumped into and when I stood up and put weight on my knee I felt my knee cap go to the side I had to hold it to prevent it from moving then I tried to stand again and same thing, I can bend my knee with holding and straighten slowly but it hurts once it’s in a position to do the other. My question is does this sound like subluxation or any kind of tear I currently cannot walk on it is that normal for a sublaxafuon?
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