Stressed

So had my last growth scan before my c section on Monday, baby's dropped from the 50th to the 3rd percentile in 2 weeks and they had 3 people check her measurements, I know its just an estimate but of course my anxiety is sky high as she's dropped weight inside, gotta go back on Saturday for my pre op and monitoring, my first baby was a 99th percentile baby so I'm very much out of my depth right now and even though it's only 4 days away, I feel so beyond anxious about her incase she is dropping weight inside the belly, the cord flow and fluid was all fine and my placenta is working great, I just needed a vent, going through this pregnacy alone and I'm feeling very overwhelmed and anxious, just want my baby girl to be okay x