Am I crazy or is this normal?

My husband has been planning a snowboarding trip. I hoped it would just be us but he invited a bunch of coworkers.

Well one of those is a female. A pretty one.

I saw he sent her the info and the cabin we want to get, and it’s not officially bought yet but he said we were staying there.

I am really upset because I had no idea he was even friends with another coworker girl enough to invite on a fucking snowboarding trip. It’s the fact I know nothing about her. She has a name that could be shorted to sound like a guys name but her full name is feminine. He could have mentioned her by that name and I assumed it was a guy?

I don’t know but I don’t like it because I am at a very unhealthy mental state. I have jealousy issues, and I know it. I’m working on improving my toxic traits but this has set me off into a panic attack. I know he needs friends but I am automatically threatened if they are female. It’s sad. I wish I wasn’t like this but I am. Would this bother too? Or is my jealously showing?

Edit: yes I came to the conclusion my jealously is the problem. He also said that he’s playing wingman for his friend and invited her for him..