Stapled hemorrhoidopexy Post-Op issues.

I am 13 days post-op after stapled hemorrhoidopexy, rectal polypectomy and sphincterotomy (for a fissure). I am completely off antibiotics and painkillers since one week, and my pain levels are also lower. The only complication which I'm having that is bothering me, is that I'm taking cremaffin plus syrup (20ml) with warm water every night which is causing loose motions from morning to noon every day. This is turn is causing burning pain in my rectal region (6 o' clock position where my grade 3 internal hemorrhoid used to be) The pain is so severe that I'm having great difficulty urinating for the next 2 hours.. by evening things are becoming normal and I'm again almost pain-free. What can I do or should do? Please help me. This is making me anxious. (PS: I'm taking warm water sitz bath with betadine thrice a day along with topical ointments like Crema gel and Metrogyl-p that I apply after bowel movement)