I'm worried about my past catching up with me

So a few years ago I worked as a stripper for like a year and a half to pay for some things. Looking back I really regret doing it. I'm always about people finding out about it in the future and it effecting my employability. So far nobody except a few friends know about and I hope to keep it that way but I'm worried that in the future it could come back to bite me.

Is there anyway I can keep this thing permanently hidden and if not then what should I do in the future if someone finds out? Like, how badly would it effect my image and is there anything I can do about it? What do I say to people of they find out?