VBAC, in the majority of cases, is very safe, in fact the statistics say that it is actually safer than the major abdominal surgery that a C-Section is.... You have been reading and educating yourself, so please know that many women have had successful V-BAC's!! Make sure that your doc is really supportive of it.
If you havent already, read them
Here are some books I Highly recomend:
Ina May's Guide to Childbirth-By Ina May Gaskin
The Thinking Woman's Guide to a Better Birth- By Henci Goer
Birthing From Within-By Pam England