blockage of the esophagus or Chromosome imbalance??

[mrsmccosley]

I am 19 weeks and 3 days with fraternal twin boys. I was put on bed rest yesterday due to baby A having to much amniotic fluid which is putting to much pressure on my cervix. I am now on the worry stage as they say his stomach doesnt look "filling" which could be caused by a blockage of the esophagus that prevents swallowing, which they can not diagnosis until birth so it could be a million other things and the option of it being something chromosomal came up. has anybody else experienced anything similar to this during pregnancy??