I purchased two pieces of fresh pork tenderloin on Sat from a well-regarded butcher in Chinatown. I planned on cooking it today (Wed) but when I opened the bag, it had a strong sulphur smell to it. It's only been 5 days. Has it gone bad? Should I throw it out? I'm new to preparing pork tenderloin so I need help! It was just a $10 investment, but I'd really like to know how long I can keep it in the fridge before I cook it. I've been storing it in the bottom, coldest drawer of my fridge.