litia725, obviously you think you should challenge again (you gave multiple reasons why you should, but haven't mentioned any reasons you shouldn't), but I'm inclined to agree the posts above me.
It also sounds like you're comparing your playing to everyone else in your section. I find when I do that, my attention is taken off of my playing. Definitely, look to other players to see what they're doing right....heck, maybe you can learn from them! But, the only person you should worry about playing better than, is you yesterday. If you work to make sure you improve something every time you pick up the horn, then you're influencing the only thing you have any control of once auditions come around again.
So again, I'd follow the advice in the couple of posts above this. Be the best darn 3rd chair anyone's seen.