I don't know. Some "memories" can just be what we were told about something that happened or just matter-of-fact anyway, even though they'd be upsetting to others? I had a T who was convinced I had a traumatic memory that I don't have and did more harm to me trying to force me to "remember" what isn't there than a memory like that would have/has on me. I don't think if memories aren't coming up "naturally" that it is necessarily their time, especially if you aren't feeling bad/upset about it and consciously trying to hide anything, etc.

I wouldn't let someone else dictate what I should or should not be feeling. It's your therapy and if you're feeling anxious/helpless that's not good? I wouldn't like that. Can you find a memory that you do attach feelings too, good or bad? I'd start with something easy/that works and work up to things that aren't coming right away.