I have been experiencing rectal bleeding for over three years. I have undergone two colonoscopies and two gastroscopies. The first colonoscopy diagnosed me with hemorrhoids, but the second procedure did not reveal any issues. Over the years, my rectal bleeding has worsened, and now the water in the toilet is red when I have bowel movements. This situation frightens me, especially since doctors have been unable to provide a clear diagnosis.

The bleeding typically occurs after I experience heartburn, a feeling of air trapped in my chest until I manage to burp out the gas, and a constant sensation of phlegm in my throat. I can always anticipate the bleeding because, prior to it, I feel lower abdominal pain, followed by stools that contain blood, which also turns the toilet water red.

I am seeking advice on what steps I should take at this point because I am constantly afraid when I see a lot of blood, and I am unsure of what is causing it.