Icephoenyx,
having BA at the same time a SRS was declined for me due to the 2 hours added OP time to an already long 7 - 8 hours SRS procedure.
If asked now, it was the right decision for me --- how ever if you're lots younger it could be OK.
Yet if you scared now already, I would NOT do BA on top of SRS. It's a lot for your body to handle, in terms of major added general anaesthetic time, discomfort/pain, more drainage, medication, and more difficulties to move about for some time post-op.
I was glad it was declined by my surgeon.
As always.... YMMV
Take care,
Axélle