fistula or folliculitis?

Dear Doc,

I have a small pimple beside the opening of my *****, it enlarged then became small, one day, it became swollen and exploded while I'm sitting, pus and few blood drained.

I am very concern now because the healing takes so long as oppose to ordinary pimple. 3 days after the rupture, I visited Emergency Room of St. Luke to have it checked, 2 doctors (I assume general physicians) diagnosed it by observation that it is folliculitis.

3 days after, there is still drainage of clear white fluid from the scab when I put tissue and press it, drainage turns yellow when I leave it alone for a longer period of time before pressing it with tissue. I visited a colo-rectal surgeon, by his inspection and applying finger pressure inside the *****, his diagnosis is also folliculitis. He prescribed some antibiotics. After 5 days, the drainage is less than before, but still exist, does folliculitis take very long time to get healed in sweaty area or the doctor misdiagnosed the fistula as folliculitis?

I did observed that drainage is worse when I do any activity or sitting very long time that makes my buttock sweaty.