measuring behind and reduced fluid

Kyrah
So they finally gave me another ultrasound scan after my trips to the hospital knowing there was something wrong. She was in an awkward position so they couldn't get all her measurements. But I am nearly 25 weeks now and from what they could see on the scan is that baby is measuring at about 22+4 weeks and the fluid is reducing. I have another scan on Friday to get all her measurements and to see if the fluid is still reducing. They say if it continues I'll be sent to London to have her this early. Anyone else experienced or know anything about this?