Thanks for your query.
What you have sounds like anal incontinence
This would be a third degree perineal tear.
sounds quite radical for such a condition.
Without examining you it is difficult to say what the exact treatment should be.
you could write to me at http://doctor.healthcaremagic.com/doctors/dr-aarti-abraham/64623 after uploading a picture, that might help me to guide you better.
There are corrective surgeries possible for perineal tears.