Irrationally Terrified in New House

My wife (28F) and I (28M) finally bought our first house! It has been an extremely long road with both of us starting our childhoods in poverty and making our way through to where we are now with both of us having our PhDs, a baby (11 months M), good jobs, and now a house!

I am extremely excited about our new house and I can not wait to make it a home. However, I am becoming irrationally terrified of monsters in my new house. I firmly understand they aren't there. The supernatural is pretty much the only thing that scares me. I've been watching horror movies since I was WAY too young and they hardly ever really bother me. I'm also generally pretty hard to scare or terrify, but I do have a hyperactive imagination.

When I was younger, I had severe depression and anxiety which gave me induced psychosis that made me see and feel all kinds of wildly terrifying things. It isn't quite to that point yet, but it is making it nerve wracking going into my basement. The basement is a fully finished day basement that leads out to the backyard, so it isn't like it is generally creepy or anything. My mind just conjures ideas of different entities in the dark rooms, corners, and peripheral vision.

I've also lived in a handful of different houses and apartments and have never had this level of fear. There might be the stray thought, but this is somewhat persistent.

Is this something any of you have encountered? What are some things I can try to help me absolve these fears?

Tldr: I'm imagining monsters in my first house and it is terrifying me. What do I do?