In fact, there are very few prophetic dreams. Most dreams just sum up our lives and then tell us how to do it.
You dreamed that your husband brought back a pig, and he slept with the pig instead of you. I think this dream is just that you are worried that your husband doesn't like you and has a new lover. Piggy means swearing in a dream, that is, you turned your husband's new lover into a pig in your dream. It's just your worry. In reality, your husband does not like others. This is a dream to tell you that your husband has been a little cold to you recently and would rather hug a pig than you. You should find out why.
Of course, the pig in your dream may be your symbol, depending on whether you have the characteristics like a pig: such as cuteness, simplicity and so on. If there is, then this dream is just a joke with you.
Please forgive me if the interpretation is wrong.