I’m Getting So Annoyed With Feeling So Scared..

Hi ladies. Feeling super anxious all the time at the moment. Had a scan yesterday which revealed our second and final child is going to be a boy, our first is a 9 year old girl. It took us all those years to get pregnant again and I’m absolutely petrified of losing my baby somehow knowing this is the last time. I don’t help matters by looking up statistics online of things. I tend to get even more anxious when myself or others purchase things for the baby. I wasn’t at all like this with our daughter while pregnant :( . I am 18+1 weeks and just know the next 22 weeks are going to be hell on my mental state. Does anyone else feel like this? Or know of any way to chill out?