I am glad you told your Sponsor, and from the reply you recieved, it sounds like you have a good one. Relapses just stink! We feel guilty on top of everything else, and it is usually that guilt that keeps us drinking. I am so happy you are jumping right back into recovery, it really is the only way. Please be kind to yourself, I personally don't know anyone(including myself) who hasn't had a set back (I have had enough for three people, my head is pretty thick). This disease will try all sorts of things to keep us out there, and guilt is one of its most powerful tools.
hang in there, we are here for you.
Cathy