Always remember, it is the price that is falling and not the business or financials deteriorating.
Do not panic, instead look at the financials of the company and check the parameters on which you bought the stock.
If they are still the same and there is no change in the business, then it is nothing just a discount on prices.
Be in quality stocks, where earnings are consistently growing. You will definitely do good in the market. These prices will bounce back within a month or two