Changing my mind after accepting a top school

I am in a dilemma!

I accepted one of the popular west coast highly rated school over other Ivy’s and feel I made a mistake
Since May 1st was the drop dead date for acceptance , I was wondering if any one could help me with making a change on my college decision

Call the admissions office ASAP and speak with the person that covers your territory. Let him/her know and they will often allow a change provided they are not over subscribed. You need to let them know before they fill the class on the wait list,

Thank you !