You're experiencing adjacency diffusion. It's sorta a hard pill to swallow, but it's the easiest explanation if you can stomach it.

The items aren't going missing. They simply just never existed /here/ in our universe. There's a nearly infinite collection of universes which exist, alternate versions of the same reality playing out nearly simultaneously and usually separately.

What's happening is that your consciousness in our universe (universe A) is sharing conscious insights with your consciousness in another universe (universe B). Adjacency diffusion is where your thoughts and the thoughts of your counterpart are interfering with each other.

Two questions for you.

1) When did this first start happening to you? 2) In the leadup to the first occurrence, did you have any harrowing near-death experiences or more likely near-near-death experiences?

It could have been that in our universe, you had some near-near-death experience (like watching someone almost get hit by a bus kinda thing), and in the counterpart universe, they had an actual near-death experience (like almost getting hit by a bus).

If this was the case, it's possible that conditions were right and her consciousness reached out and linked to yours as preparation for her imminent demise, only to have her fate evaded. Normally when this sort of consciousness bridging occurs, the death of your counterpart does also happen, and so you get the non-living snapshot of the consciousness to date linked with yours. Things like odd memories and inexplicable details of your past being different and their ilk stem from this.

In your case however, your counterpart didn't die, and the link is still established, so you're now getting diffuse information about their version of the universe overwriting your own in ours.

I guess one final question for you because it was unclear from your post: Did your husband actually also see the sushi disappear? It /sounds/ like you're saying he was there with you when /you/ noticed it, but he was only sympathetically confused asking /you/ if it happened.

So I guess my question is, in this situation with the sushi and your husband, if you had not established this whole "stuff missing in front of me" thing, would your husband have noticed the sushi was missing?

If the answer is yes, it might be something even... more complicated than adjacency diffusion. But if the answer is no and he was only near you but not an active participant in the missing item realization, then it's almost certainly AD.