If there is liquid coming out of that hole, I'd be worried...that means other contaminants and wild yeasts could get in there too. If you're able to run to a LHBS nearby, I'd just get another package of yeast. If you feel adventurous, just dump it in your brew, but I would hate to ruin an entire batch. If you can't get to a LHBS, then just postpone your brew day. That's a hell of a lot better than having to throw out 5+ gallons of the good stuff after you put all that work into it.