I don't know, I haven't been with a load of woman, more thank i would like to say....and it can go either way...three does sound like a lot, no matter what....however.
but then on the other hand...if your subconsious is telling you to question then you should listen up....just wrap that deal mo matter what, and take a step back and see if there is reason to think she would tell you lies. Girls don't like to look slutty in any way shape or form. so if you think she's trustworthy, then have fun but take precautions (always) and think hey a great girl is letting me mess with her toys...
other wise find a new girl cause situations that can occur down there can last forever, if you know what I mean