Talk to Urologist on Pain In Anus - Prostatitis - CPPS

I am 29 years old. I have bladder irritation problem from the last 3 years. Whenever I drink coffee or take high intake of caffeine, my bladder (lower abdomen part) starts irritating. I had a night fall problem as well for which I started taking librax and seroxat cr and its gone now ALHAMDULILLAH. With librax and seroxat cr that irritation problem has also gotten in control to 80% ALHAMDULILLAH. My main problem now is that almost 2 years before, I masturbated for 2 consecutive days and suddenly I started ball stuck feeling in my anus with a dull pain in my anus. I thought it might be hemorrhoids, I started treating for hemorrhoids but nothing happened. I did 4,5 times proctoscopy and one time endoscopy and it never showed any hemorrhoids. Endoscopy showed IBS as I had mucus in intestine. Now I want to know how can I get rid of this anus pain problem. It burns when I sit for sometime. Is it prostatitis or chronic pelvic pain syndrome (CPPS)? or a neurological issue? I am very