So worried 😭

I’m 21 weeks and I keep just always hearing on social media of people who have lost their babies at 24-38 weeks like how does this happen so much ? I’m so scared of something happening to my little guy. I wish the rest of this time could fly by so I can have him with me and know he’s safe. I heard that increased OR decreased movement can be a sign of something wrong. Babies movement has increased like crazy within the last week or so but that could just be cuz he’s growing right?