It's incredibly frustrating when you feel you are about to open up/reveal something important and session is up. It's also often frustrating for the therapist, but they rarely go overtime since they have to "hold the therapeutic frame" (maintain time boundaries).

Experienced therapists are trained to "whine down" the intense topics toward the end of the therapeutic hour. However, this is not always achieved.

My T. has a clock facing her and a clock facing the patient. I find this very helpful because I can look at the time and decide whether to bring something up or not. It's not a perfect strategy, but it prevents me from losing track of time and bringing up something that needs "processing" at the end of session.

Perhaps you could check the time during session, or ask the T. to give you a 10 minute warning.