When I won my first qualifier I was pretty suprised.  Not because I didn't think I was good enough but more because I didn't think I was prepared enough.  I found out about the first qualifier I won 3 days before the tournament and I had just started college for the year.  I was still getting moved in and everything so I hadn't practiced.  I ended up playing the best I had played in a long time.  I was very suprised.  
After winning the first one, it was tough.  I started travelling and finding out that there are a ton of women that play.  I had a lot of tournaments that I didn't win so that taught me alot as well.  When I finally won a tournament afer travelling 1,000 miles.  I was excited and relieved.