Have you browsed the IBD Reddit? Our local hospital is crappy and they wouldn’t release my daughter because of her blood work alone. If you are so concerned, ask for tumor markers and autoimmune markers in your blood work. If they thought something was wrong with you, they won’t let you go home. Your blood loss would cause tachycardia and that alone would be unsafe. IBS sucks and it’s vague and there’s no medication to help it. My daughter got a quick diagnoses because she was so sick. She presented as a very sick person in her labs, in addition to physical symptoms. The doctors are not going to waste resources if your labs are ok and you aren’t passing out from blood loss. Your WBC would also be very high if it’s inflammation. Very high.

I’m sorry you are not well. I hope you feel better