If it helps, I'm at 2.5 years and counting. ya-I'm special that way. :laugh:
We had to go really really slowly because I had so much in my head that just kept popping up at random intervals. So ya, it takes as long as it takes. You might find that you can resolve one 2 minute thing over here, then a 3 minute thing over there, but only 30 seconds on the third. There is no right or wrong - you have to learn to trust your brain to take you where it needs to go.
It's ok to ask your T to slow down if you are getting overwhelmed. But once you get that first big win, where the horrible event that haunts you becomes just an unpleasant thing in your past you think about with some sadness, it will all be worth it.