Camera - your pelvis may be small on the outside, but it's the space inside that counts! I shall be attempting a VBAC very shortly - due on 21st of this month - I'm also just under 5ft, with a hip measurement of 33" when not pg - both my MW and consultant are confident I can at least have a go. My mother is smaller than me (4ft 10), also slim hipped, and she had 3 children naturally, my aunts also are the same height and shape - again, no problems with delivery.
What I'm trying to do to assist my chances in success is ensuring baby is in the right position (ie not back-to-back) I do this by following the optimal fetal positioning advice my MW gave me. Also, I will be trying to ensure I keep upright in labour - I shall be taking my birthing ball with me and insisting that my examinations be done in the position I feel most comfortable in. Also,I've been listening to music to help relax - will be taking the same to hospital with me for labour.
Camera, it's important to have a good, supportive partner as well - rows happen, forgiveness and forgetting usually follow, If your dh supported you in your birth before, I'm sure he'll be there for you again.
Speak to your MW about fetal positioning - knowing that you've done all in your power possible to help prepare for your VBAC should help you get your confidence back. My POV is if it works, great, if not, then hey, I tried - I still get a baby at the end. Good luck!