so I was looking at crib options, and my mom suggested a pack n play. so I did a little research and found that little to no people reported back problems in their children from letting them sleep in a pack n play, and there are also mattresses and sheets made specifically for a pack and play. What do you guys think? I'm a little hard pressed for money, and of course I would get a crib later on, but would a pack and play be okay for the first few months?