K.M.
Oh sweetie, I feel so bad for you!!
I would not wait to see if the pain persists. I would make an appt tomorrow and get back in as soon as you can. In the mean time, what about using a stool softener (there are plenty of them OTC) to help out? They are different from a laxative, read the label carefully.
I only suggest this because I had a level 4 tear with my first and like you, had stitches everywhere. They recommended "Tucks" pads (I would layer a bunch of them over a maxi pad and it really felt good, kind of cooled everything off down there) and that I continue to take a stool softener daily. They didn't make me "need" to go, it just made going easier. Sorry if my answer is TMI!! :)
Also, drinks lots and lots of water and maybe pop a motrin or two for the pain.
Let us know what the doctor says! Good luck and take it easy!