Weight loss while preggo!?

Hey ladies... so it has recently come to my attention (i weighed myself last week at home) that ibhave lost 30lbs since i got pregnant 14 weeks ago. Is this something i should be concerned about? I haven't really changed my eating habits or my level of activity. What do you guys think? I plan on talking to my doc at my next appointment just wondering if I should make an appointment sooner.