I agree with what others have said. I don't think you can force memories. I too get frustrated sometimes because I know things happened but can't remember the details, which makes validating them hard. I have to trust that they happened as my intuition says they did.

Your dreams may also present to you memories or parts of memories. Like you might see a room or furniture or a person in a dream that's from the past. You can use that to remember that thing and perhaps more memories will come. So you might want to pay close attention to your dreams as you work through these memories.

Stay strong!