I weaned off slowly so it was more gradual and natural. I didn't have more than one night of engorgement. My supply was very good with keeping up with the demand.
I remember a few nights that I had to release some pressure into the sink but within a day or so it would diminish. Did you quit cold turkey? Do you have any desire to pump for a week or two just to help your supply slowly diminish? I can't imagine what it would have been like just to stop. We started supplementing at 3 months and within 2 months just naturally stopped on our own.