No heart beat at 6 weeks I’m so scared

I feel so scared. I had a private scan Friday and they referred me to the early pregnant care unit at the hospital as they couldn’t find a heart beat. I’m roughly 6 week 1 day when they did the scan. Since then I’m getting myself in such a panic. I don’t feel as pregnant now which is making things worse. My boobs previous were sore but now hardly sore at all. I’m meant to be going on holiday next Monday and they said if they want to investigate then I may not be able to go making me panic more. Really not coping well at the moment. Has anyone else experienced this. X