With all due respect, what you did was not investing; it was closer to speculating. If your time horizon is less than 5 years, what you should look at is a savings account/certificate of deposit, not the stock market.

I had a mutual fund once (the Putnam Health Sciences Trust) that went down three or four years in a row (probably about 30-35% total). The same financial advisors who recommend I buy it advised that I sell it for the last two years I owned it. I didn't take their advice and held on to it - the next year it had about a 75% increase. I would have missed that and locked in my losses if I had listen to them.