Only you can decide if you are willing to give up Stanford for Wesleyan. No stranger on this board can help you with that personal decision.
That said, if you are committed to attempting to request Wesleyan ED2 after decisions have already been released, go for it. I cannot imagine they will make a deadline exception for you, as this would open them up to all sorts of consequences from other applicants who might say, hey, me too!
So, if you want to contact admissions tomorrow and inquire, go ahead. I’m betting they will say ‘no’ to any such request.