Ouch!
In May, my net worth dropped 3.87%. The market had a rough month, and my drop is entirely in investments. My cash accounts are doing fine and I continue to save (and invest in my retirement accounts). I knew it was going to be a bad month when I went to update my Roth IRA numbers and it was worth less than it was last month, and that's with a monthly contribution! Not a good sign at all.
But that's part of investing. Give and take. And I'm still up for the year, and that's important. Thankfully, I don't have any stock in BP, so I figure that the numbers will eventually come back. Nothing to worry about. Just keep doing what I'm doing, saving and investing, and getting ready for the future.