Just had 28 week growth scan and......?

the femur length is a little short and only measuring 25 weeks so three weeks behind the rest of her body... she is a little under weight for what she should be and now i have to go back for a doppler scan next week to check the blood flow ect..... i came away feeling that things hadn't been explained to me properly and soam wondering if anyone else has had a similer experioance and if so what was the out come???????