extra amniotic fluid

I went to the doc today and she asked when my last ultrasound was. She said she can feel extra amniotic fluid just under my chest directly in the center there. Plus baby is very high. (35 weeks) She said I am measuring good so she is not concerned. We will check the amount of fluid next week in my ultrasound. Has anyone ever experienced this? Even if she is not too concerned of course I am. Any feedback is appreciated.