Hi abfab. I can only speak from my own experience of a very early scan; others will have different stories. I booked a private scan for 6+4. No idea why - it's far too early and I can only blame pregnancy hormones (I understand some have scans for medical reasons at that stage).
The scan showed a sac and fetal pole, with no heartbeat. This is normal for that stage or pregnancy but absolutely not what i was expecting. They also cannot measure accurately at that stage, so I was told the baby was under-developed according to my dates. I had to wait a week, thinking the worst - baby too small, no heartbeat - and was then scanned again. The second scan showed progress but not as much as it should, which wasn't picked up due to the challenges with measuring at that early stage. So i then got told all was fine, baby was growing well etc. Unfortunately it wasn't, and I lost it a week later.
This is a story at one end of the scale; as I said, there will be people who have really positive experiences of early scans. If I were you, and this is what I'm doing this time around, I would wait until at least 8 weeks. Then you can be sure that you absolutely should see a heartbeat and they will be able to measure much more accurately.
Betty Hope you're ok. It's great that your boss is so understanding.