I went to see a chiropractor and he told me that my knee is might be little problem of meniscus injury.
In beginning,I thought "oh my good ness!" but there is many people struggling in worse case than me.
When I was little,my mom always told me to think about other people in worse case than me.Like when I said "I don't like to eat vegetables",she said "think about there is many people died of hunger"...
So I'm O.K..I'm better than those struggling people.
And I believe my knee will be completely healed and go surfing and ripping!
I will be just fine.