Scared!!!

Well guys,since I'm back home in Penang,with nothing much to do and all that except school home work,the church musical chariperson has asked me to play the guitar but...I've been so out of practice that I'm scared to play actually.Fingers are all soft now and my chords dictionary is still quite empty.But what to do,its this Sunday and I've gotta do it no matter what.Cant keep postponing it.Pray for me ya.Thx guys.