I have read your question,
Without physical examination and medical history , I cannot conclude anything here, but mostly you may be suffering with hemorrhoids,constipation
,and mostly anal fissures due to passage of hard stools,
I suggest you to take plenty of water , with fibrous food like oat meals and non-spicy items, A natural procedure in which take a tub , with luke-warm water and salt and sitting in it would give a temporary relief.
The Drugs you have mentioned should work well for you , and i Suggest you to discontinue Zentel
As it is not related anywhere and its dosage is once in 6 months as well.
If yout problem persists , I suggest you to consult a gastroenterologist
Wishing you a good health,