Please help: i went to the eye doctor yesterday and they gave me the eye drops that dilate your pupils. they both constricted and went back to normal over a few hours. i just woke up this morning and now one pupil is bigger than the other?

Nothing to be done at this time, just wait for another day and see how it is tomorrow.

Normally both pupils dilate & constrict together. After being dilated by the ophthalmologist the effect usually last hours but can last a day or more. It's possible that the one pupil is still reacting to the dilation from the day before & got a stronger dose. Nevertheless I think you should call and get advice from your ophthalmologist.