Hello & welcome to the New Age forum
You are astral travelling in your dreams. We can all leave our bodies when we sleep- but most of us are unaware- we don't recall & we don't consciously direct the travelling.
You have a gift- it's scaring you now, but many people would *love* to be able to do what you can do. Why not treat this as an exciting experiment? Talk to your husband about it. Ask him to put an object up high just before bedtime- top of wardrobe for example- and see if you can describe it next morning.
Don't be scared. I read a book by someone who consciously cultivated this ability: Adventures Beyond the Body by William Buhlman. It might help you to track it down & have a read- you'll realise that you aren't the only one doing this.