Hi newhere, I had a 'bump' from 6w in my last pregnancy caused by bloating, because pregnancy hormones mess up your digestion (may also notice more gas, ahem). My bloat bump was much bigger in the evenings, sometimes I looked 7 months preg by bedtime then had no bump at all in the morning! In a few weeks it will turn into the real bump although may take a while if you've got good abs, some skinny toned women have flat tummies at nearly 6 months (my abs are shit so I had a pretty big bump by 14 weeks first time around)
Assuming you're in the UK you will usually have a booking in appointment with a midwife between 8-10 weeks, it's blood tests and paperwork at that appointment, they don't scan or listen in with a Doppler.
The first actual scan is at 12 weeks give or take a few days. In my area they listen in with a Doppler at the 16 week midwife appointment but in some areas they don't until the 20 week check.
This all feels like ages away now but it will come around quickly!
I'll be shelling out the £80 for a private scan at 8 weeks because I'm far too impatient to wait!