Peppermint tea?

I really love my teas, and most of what I drink is safe.  I am reading a lot if contradictory things about peppermint tea, though. I know it's good for nausea, but on some sites it says that pregnant women should avoid consuming large amounts.  Some sites say it's totally fine.  I don't see my OB for another 2.5 weeks, so I won't drink it until I get confirmation one way or the other.  I was just curious on what you have been told/read/think.