I had had these as well. I think that, once you start therapy, you are opening and re-opening so many experiences and emotions. We are sometimes able to control them during the day and keep them hushed and quiet. At night, however, when we aren't in control of our mind, I think those feelings are less restricted and more likely to show themselves. When you're dragging up all these emotions and memories, they are bound to come out in some way. In your dreams, they can show themselves without you stopping them. They are hard to get through, but, sometimes, that can offer you great insight into what you're truly feeling about a situation or memory. Like Rec said, it really would be a great idea to jot them down and share them with your T.

From what I've been told and experienced, it is pretty normal though. Once things start coming out, maybe they will stop being so intense too.

Best Thoughts!