10 week anxiety

Hey guys, I'm 10 weeks tomorrow & haven't had any horrible symptoms or bleeding. Everything'a been healthy as far as I know & we even heard the babies heartbeat at the first ultrasound a couple weeks ago. However, despite how easy/smooth it's been so far I have horrible anxiety. Right now I'm freaking out that the baby isn't developing or that the heart will stop beating. Or that because I haven't had horrible symptoms or nausea that something's wrong. Is that normal to freak out about stuff like that??? I keep trying to tell myself everything was healthy at the last appt & it's okay..