You should look it over the same way you were going to look it over previously. Even if the car was assigned to someone else, that doesnt mean they rejected it. With that being said, we dont know.
Its the end of the quarter, though, so tesla always tries to sell as many cars as possible at the end of the quarter. They ship cars to be on site to be sold so they can hit those sales dates. You ordered right before the end of the quarter, so its just as likely to be just a car they had there as anything else, but you should still look it over however you were going to previously.
If this is too fast, simply tell them "this is a bit too fast for me, I will not be available to take delivery until after (insert date in 2nd / 3rd week of april), that would almost assuredly push you out to end of june delivery.