Postpartum Flare?

I have UC and I am 4 weeks postpartum experiencing diarrhea and stomach cramps but no bleeding. I’m terrified that it’s my UC flaring up, but I’ve only had a flare up once. I was diagnosed in 2022 and went into remission before getting pregnant in 2023. I know the stomach pains feel like it did when I flared, but I’m not bleeding in the bathroom like I did previously. Maybe it’s a stomach bug? But I’m curious what some of your experiences were postpartum.