@iPoop, I did have a full panel of stool tests about
four weeks ago. All negative.
I just got off the phone with my GI's nurse and she is going to look into seeing if stopping all 5-ASAs for a few days might be worth trying and also seeing if it makes sense to stool test again. Meanwhile I got insurance approval for Humira and am looking that in the face, though hearing more from people is helping me process this mentally a bit more.
@Crispix, thanks so much--your thoughts were really helpful!