Hmm I'm not sure. I would ask more questions for sure. Call your ob ad ask them what that means excally. They should have more info and should have gone into better detail as to what that means. Try not to stress. Please update what you fin out.
I had too much fluid with my second pregnancy and they had to do an ultrasound every week until I delivered, they told me if it got too much we would have to deliver early that it could put the baby in distress but they didn't have a cause for it.
not sure why, but have they given you any reason for this, or asked you to be on bed rest ?