Why do I feel intense sadness and fear during deep guided meditations?

When I follow the guide into a deep, quiet space, I suddenly feel intense sadness and fear. These feelings seem too strong for my current life. This wave of emotion is hard to endure and leaves me feeling drained. I think these emotions are connected to an old trauma I need to deal with. I'm concerned that the intensity is too much for my mental health to manage without a therapist. I wonder if I should keep my sessions shorter. (Name: Aarti, Birthday: 2nd June 2000, 6 AM)