Pro vision scan at the airport

Farah • 👨‍👩‍👧✈️🛍
I'm 23 weeks and the airport security at London Heathrow  let me to pass through to PRO VISION SCAN even I  insist to do manual patch as what I've done in New York and LA but they said it's safe don't worry. Deep inside of me I'm crying and so worried. Is there anyone experience this scan?