I think you got Sentinel pile removed.Sentinel pile is not a true pile,it is seen in Fissure in ano
So,Apart from Removal of Sentinel pile,Anal dilatation should also be done,preferable under Regional Anaesthesia.
Please take plenty of fluids,green leafy vegetables.Sitz bath has to be taken regularly,preferably with Betadine
solution.Apply some topical cream for quick healing with your Doctors advice.
Relax.It will be relieved soon.