hi i had gone through your query and understand your concerns. i would come up with the possibility of HEMORRHOIDS may be the cause for your sufferings.
-the discharge have offensive odour if with infection.
-proctoscopy examination may confirm the diagnosis
there is another possibility like ANO RECTAL ABSCESS
;local examination may confirm the diagnosis
i advise you taking Homeopathic
medicines gives safe and permanent cure for your complaints without any surgery
consult your local homeopathic physician for correct diagnosis of the case and remedy to fit your complaints
I hope this is helpful for you, thank you