Id say go for it, even if you stutter it is a way of facing fears, no one will think less of you and youd be surprised at how many people will sympathise with you.. I once was asked to do a bible reading and i missed the last two verses.. everyone sate there wondering what happened as they were all prepared to hear it.. Some people came up and said good job and when id reply with i stuffed it up they simply said.. its more memorable and probably made people think about the passage more. Im not minimizing how difficult your situation is but, you wont die by facing challenges and you may be encouraged by the support you receive from it.