During past two months or so there has been anal discharge, excessive flatulence, and excessive mucus in my stool. it's still happening..wondering if maybe i got that from when someone peed in my rectum. ibd or std? infection? i have photo.

Many Possibilities: Could explain the symptoms. It could be an STD, a change in diet, IBD, or any number of things. They could all be from one cause or even multiple causes. I would start by seeing a physician,be frank about your sexual activity and request a VDRL and HIV screen to rule out STDs. In the US you can also get these done at most health departments for little or no fee.