Lump Near Anus Question

So recently I discovered a lump near the anus. Though it was rather uncomfortable it wasn't growing, at least noticeably. It was also rather small and painless. So I discounted it as hemorrhoids. (No bleeding) The lump has now shrunk/started to disappear. If it reappears should I contact a doctor or should I contact one anyway now that it is clearing up for input? Given the holidays I didn't have time to bother trying to see one. Not that now is any better, but curious as to what I should do.

Dont worry

I take it the going away/shrinking means it is a hemorrhoid clearing up?