I was told i have ibs which i have had frequent urge to use the bathroom usually little stool comes out but accompanied by mucus i've been on bentyl which is helped out a lot until yesterday i have had bloody mucus in stool after straining ?

Inflammatory bowel?: This sounds like you have proctitis or proctocolitis i.e. inflammation of the rectum and/or colon, i.e. inflammatory bowel disease (Crohn's disease or ulcerative colitis). Or maybe just irritable bowel plus a minor problem like hemorrhoid or anal fissure. If you have had receptive anal sex with other men, it could be an STD e.g. chlamydia, gonorrhea, herpes. See a doctor soon to figure it out.

Blood in stool: needs assessment. However there is a question mark here but no actual question. So, If this did not address your concerns then please resubmit with clarification.

Bleeding.: IBS does not include bleeding. The bloody mucus indicate something different. You need to see your gastroenterologist and perhaps have some tests done in order to find the source of the bleeding. I would see to it as soon as possible. If the bleeding worsens, you could go to the emergency room. Don't delay in getting this taken care of. Good luck.