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Raspberries (and blackberries and all those similar) have a short shelf life which is why you rarely see them sold in stores. They might last a day or two but go bad fast (even with refrigeration.) Blueberries also go bad quickly but can last a bit longer. Yes, refrigerate them, but don't wait too long to eat.
How to freeze blueberries. 1  Use fresh blueberries that are completely dry when you pop them in the freezer.  If you prefer to rinse the blueberries first, dry them well with paper towels, then transfer them to freezer containers or resealable plastic bags for freezing. The blueberries will freeze individually so you can remove just the portion you need.