Recent job interview? How long should I wait to call them after?

So I recently had an interview and it went really good they said they will call me after finishing some more forms how long should I wait if I don't hear from them to call and ask if I'm still in the running? I don't want to hold off on my job hunt.if I ain't getting hired. I also don't want to continue if I am getting the job.it has been 3 days now. Any advice?