I see that you had a very bad day and lost 50 points on your rating already.
I reached 1552 briefly about a year ago. I was patting myself on the back and starting to think I knew what I was doing too.
It didn't last. As you can see, I have slipped back to just 1437 now but at one point I had fallen as far as the low 1300's again. I started to wonder if something was wrong with me but so far, they haven't found the brain tumor. :)
Enjoy your achievement but don't get too upset at yourself for falling back.
As you can see, it wasn't a real milestone.
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