I don't have the answer and I don't know where to find it for you, off the top of my head. I don't think it would keep its potency, based on what I've read...or at least, I wouldn't trust it to do so. Not for something this important.
I think the bigger concern is "I don't think I'm ready yet" ...if you don't think you're ready, you're not ready. There is no way you should rush it and take your life when you're unsure about it, not for a few dollars worth of SN. You can always get more later and try again when you *are* sure. But this is one mistake you don't get to learn from (if it *is* a mistake for you, in the end), not in this life. You want to be sure and at peace when you decide to end it. That's my two cents, anyway. Best of luck and much love, my friend
