how to help my husband calm down?

T🌸
He's a worrier, and has been worrying non stop my entire pregnancy, but it's reached it's peak since my 20 week ultrasound is approaching. He's straight up panicking about something being wrong. Have any of you experienced this with your SO? I can't relate to him feeling this way because I'm the exact opposite, I just go with the flow and rarely worry about anything. We compliment each other for that reason lol