I had similar symptoms to you before my diagnosis...I was intermittently constipated, bloating, some gut issues, alway had joint issues. It was all written off as our family always had bad guts. I did not have fistulas until more than 10 years after my diagnosis. It sounds like you are in the CD club with your symptoms and the tests---it is very hard to get diagnosed because many tests show no inflammation or CD effects even when you are ill (I show nothing on my tests now but I know I have CD and am having a flare up).
Make sure you care for yourself with the setons in...I was lucky and mine was a more simple seton in a low risk place. Take care and hope you well with the setons.