NST-Non-Stress Test

Shelly
Worried out my mind. I don't have diabetes I have a big baby who at 32 weeks was measuring at 5lbs 9oz. So my doctor has me scheduled weekly for NST and I understand it means no stress to my unborn child but me on the other hand my anxiety is a all time high. Can someone tell me there experience with NST and if I'm overreacting ?