That money is now gone so the question is: is your overall setup and forecast of your financial future different?
See my prior entries on the sequence risk etc. Lower tomorrow is almost a slam-dunk certainty (market is closed now), as Google and Microsoft failed to impress anyone. You can ask me why I am now pointing at a company? Reason: their WEIGHTING in the Nasdaq and S&P not the fact that they are 2 companies that fact is irrelevant.