... What 'mitigating measures' did you take in addressing your moisture problem? Is the crawlspace heated/cooled? Is it a dirt space? Is it above or below grade (and by how much)? How big is it? And in what state do you live in?
Once I/we read what you did, I think I/we can somewhat 'assure' you that your next step (insulating the floor) will not 'haunt' you. Please come back and we'll go from there.
Jay J -Moderator
PS: I've done this job a few times. Usually, there's MORE to insulating a crawl then just adding fiberglass ...