Pork can usually keep in the refrigerator for one or two days. If you are planning on storing your pork for longer than two days, you will want to make sure that you put in the freezer.
By leaving it in your refrigerator for a period of time which exceeds two days, you are taking quite a few chances with it. After several days in the refrigerator, bacteria will most likely start to form on the meat, leaving it inedible. Because you could get food poisoning from eating spoiled pork, it will be important to properly store your meat in the first place, using a vacuum-sealed package.