Hi Cathy,
My heart goes out to you. Some loss of depth is normal, but maybe not to that extent. I definitely had some decrease in depth. Immediately after SRS, I had about six inches of depth, but after the swelling subsided I lost about an inch. I am now 15 months post-op and down to about four inches. Definitely not what I was expecting. I actually am considering a revision. Sex hurts, and my lack of depth has made me hesitant to have penis-in-vagina sex.
~Terri