Hi NZ, I've had arthritis since I was 15 and am 26 now. It's not exactly common at this age (and younger) but even so there are a lot of young people who have it so don't feel that you're alone
. Do you see a rheumatologist? I would try to ignore the dire warnings of "xxxx will happen in two/five/ten years", it's different for everyone so you just have to find the best treatment you can and take it as it comes.