It's good to keep track of time because it often eliminates some possibilities. Unfortunately it takes up to four weeks to get a new queen raised, bred and settled into laying and it could take as little as three to get a laying worker, but usually it takes longer before the worker starts laying.
My guess is it's a new queen getting settled too, but I'd check again in a week and see if you have some open brood and again a week after that to see if you have capped worker brood or capped drone brood and to see if you've stopped getting the multiple eggs.
My guess is it's a new queen getting settled too, but I'd check again in a week and see if you have some open brood and again a week after that to see if you have capped worker brood or capped drone brood and to see if you've stopped getting the multiple eggs.