What’s wrong with me??

I know we’re still going to fantasize about other people no matter how old or how long we’ve been married but it just seems like here in the past couple of weeks I’ve been thinking about “doing stuff” with other men other than my husband. I love my husband and I would never do anything to jeopardize our marriage. We have sex often but like I said just here in the past couple of weeks I find myself fantasizing about other men..mostly celebrities. Maybe it’s time to try new things in the bedroom and that’s why my mind is wondering? Idk. I kinda feel bad for having these thoughts so often...Any advise??