Picked up a wyeast 1056 smack pack from the local brew dude and in the rush of piling things in my arms and to get in and out I just realized when I got home that the pack is pretty well swelled up. However, I can still feel the inner pack and pretty certain it hasn't popped. Do I have a defective pack here or is this normal? I suppose I will know when I try to make a starter, but if it's a probable dud I would rather bring it back unopened.