The first time I hit onederland (two years ago before I regained 70 pounds) I felt that way. I was SO excited to get there, but once I did it felt kind of anticlimactic, like I wasn't far enough below 200 for it to 'count'. I hope to have a more realistic outlook this time, but considering how much I'm obsessing about being near that threshold again this time around, I'm not that hopeful!
I'm not sure I have any good advice for you. Something that might work, if you think you can stand it, is to swear off the scale for a couple weeks. Commit to sticking to your plan 100%, eating really clean for the whole two weeks, and then when you get back on the scale you'll likely have a decent buffer.
This is an instance of 'do as I say, not what I do', though, because I weigh myself way too often.