Thank you everyone for the replies. The borders are not at all critical tot eh over all design of the quilt so not a problem either way I go. I am sure I had at least 2 extra inches of backing, but things started going wrong when I got about mid way through the quilt and I guess that took up the extra.
I guess when I get it out of the frame and see exactly how much difference there is I can decide the best way to proceed.
Thanks for the help and suggestions!