Anxiety while pregnant

I’m currently 25w pregnant and have been experiencing extreme anxiety at night when I try to fall asleep. I remember having this exact feeling once before when I was a young kid and was being sexually abused by a family member. Once I told my mom about it I never felt the anxiety like that again. Until recently and it comes on out of no where at night and almost gives me a panic attack. But the problem is I don’t know what the underlying cause is. I don’t really have anything to be anxious about at the moment especially nothing as large as my childhood trauma. Why is this happening all of the sudden now? It’s been happening every night for about two weeks and I feel like it’s getting worse and worse.