a voice is more then enough. you don't need any other confirmation, and in my opinion, you're lucky to have gotten what you did. The only world that can be described with the descriptions we know, is our world. Anything outside of it (like your guide) works completely independent of every law that we have laid out for our known 'universe'.
So instead of repeatedly asking him for more and more actions that you would interpret as proof. Meet him half way, and practice feeling him however you can. If you're walking, and you see a leaf fall, right as a bird chirped, and it caught your attention, it's because your body knows something that your mind doesn't, not necessary your guide, this world is huge and mysterious, and it could have been any of a million significant or insignificant things, practice feeling out other worlds on their terms, and you'll be speechless at everything you learn, because there's really no way to describe it. Don't occupy yourself with knowing and understanding. People have been knowing and understanding for thousands of years, and it's only gotten us so far. Learn to feel with all of your senses together, and you'll discover another.
Explaining what you experience to someone else isn't going to work. It's going to exhaust you, fill you with their doubts, and water down your conviction to explore this new facet of your life. Don't even mention it to your husband, trust me on this, it won't help him understand, and will hinder your understanding. If you insist tho, encourage him to try to understand his own being, on his own terms.
Learn to listen to yourself.