Growth scan

Had my growth scan today and my daughter is measuring in the 6th percentile 😰 she is measuring 22w4 days and I am 24weeks exact today. So now I’m nervous they also said there is fluid on the back of her head and now I have to go twice a week for stress test and ultra sound! She is weighing 1lb and should be 2 lb they said my app said 1.5 lbs is what she should be. Now I’m nervous, and it’s always when I have this one ultra sound technician it’s a problem same thing with my son, who ended up being a stillborn ... I’m just so nervous and scared the same thing is happening again