PZ - first of all, congratulations!!!!
I completely understand your anxiety. Please stop reading the stories of loss - it's hard not to, you will find that one way or another those seem to be popping out in neon lights but you need to stop reading them for your entire pregnancy.
Also, I agree with going to get a scan - the peace-of-mind is worth it. Either get a referral if you can, or go to one of the places suggested above. I had fortnightly scans for the first 28 weeks of my pregnancy. Although there were valid medical reasons for this, it gave me great comfort - to tell you the truth, I couldn't imagine waiting longer between scans as I was always a wreck by the time day 10 rolled around. Only when REGULAR movement started did I stop worrying between scans.
The doppler is kind of a good idea - i say this because 1 - it is still very early for a nonprofessional to find the heartbeat and this could lead to more [unnecessary] panic rather than assurance and 2 - even later, when the baby is smaller, it can be hard to find the HB. Even my OB would have to search around at the beginning....the search for him was only 15 seconds but it felt like I was holding my breath for 20 minutes.

