If you really feel a pressing need to talk about flashbacks and feel that that kinda of talking has helped in the past, then by all means lead with that. However, I have had moments where I have also had to make a decision about whether to go into the trauma work or take a step back first to among other things set up safety, which with a brand new therapist would be rather remarkable if you had that established already.

That was just a hunch I had. But now I've looked at material that is pro-trauma work, but not for its own sake necessarily since it can just retraumatize if the the safety and working through are not set up for it.

I am saying very general things that may not apply to your specific situation and history so disregard if not helpful or off the mark.