Having anxiety about my 8 week ultrasound 😞

I had a miscarriage 2 years ago and I’m going in on May 4th for my 8week ultrasound but I can’t help but worry that when I go in they won’t find a heartbeat.... my miscarriage was so hard to go through and I’m trying to keep calm and have good thoughts but I can’t help but think the worst.Also the 4th was supposed to be my due date with my first so that’s probably not helping much,anyone know anything I could do to help calm myself for the next 2 weeks?