I’m always been Bi but I’m confused?

So I am currently in a relationship with a man and always have been although I am bisexual. However in my current relationship, I never get sexual urges and when we so have sex, I’m always dry. Obviously if I get stimulated down there I get wet but even so- it takes a while. I recently got the urge to watch leabian porn and got wet super fast and I’ve been thinking badly about how I want to be with a woman. I feel like I am questioning my sexuality again like am I only into and only get turned on by women or what??? I dont know.