Yeah, I'm also wondering about the timing. Do you see your therapist for a certain amount of time (e.g., so every session is uniformly three quarters of an hour, or an hour or whatever) or does your therapist cut the sessions short when you have a flashback?

I'm going to work with the assumption that the session times are constant (but I could of course be making the wrong assumption there).

If the session times are indeed constant then the question becomes: How come you tend to have a flashback near the end of the session? I too find this... That I only manage to home in on something meaningful for me to be talking about near the end of the session. I think that what is going on with me is that I kind of do want to raise this important issue, but I'm kind of scared about doing so. Ambivalence... And the ambivalence expresses itself by the issue just happening to occur to me when we are nearly out of time (such that we aren't going to talk about it at length, but so that I do get to raise it).

One thing you could do is work on some strategies to help you cope during the weekend. If flashbacks are occuring to outside sessions and you are having trouble coping with them then there are certainly strategies that your therapist can help you figure out such that you are better able to cope with them and htey occur.

If it is that your therapist is cutting your sessions short when you start talking about the flashbacks, then I have a reason why that might be happening... But it is pointless to think about that if the sessions are of uniform (or roughly uniform) length...