The stock trades at a discount and is near its 52-week low, but is it too risky to invest in CVS Health today?When a company falls short of earnings expectations, it's not a good sign for investors. It's even worse if it also cuts guidance due to a troubling outlook.CVS Health (CVS 2.80%) has done that for three consecutive periods. Investors are likely losing trust in the company's ability to forecast what will happen, given the seemingly ever-changing landscape for the business.Either the business faces d ...