Bloody stool??

For years ive had stomach ache.
Not eating candy and eating healthy has helped some.
Beacuse of arthritis ive been on different meds and biologics and prednisone helps some.
Often my stool is changing from hard to loose.
And for the past monthes ive noticed blood on the toilet paper nearly every day.for a time a was thinking it might be Hemorrhoids but i dont know for so long?
I was checked for celiac some years back but the test came back negative.