Just saw this thread and thought I'd update for anyone who might want some info in the future...

I decided not to make a decision for as long as possible...at least until after my 20 week scan. So, I was feeling quite anxious about my scan. As it turned out, there was absolutely nothing to worry about. The cyst had shrunk right down until it was barely visible. The 'fibroid' they found on the 12 week scan wasn't present at all - the specialist thinks it was a contraction at my 12 week scan as thy can mimic fibroids.

So, at 27.5 weeks, I am confident that there's nothing stopping me from VBACing this Bub!