Aww lovely bumps juniper and jmac 
pugmum I think your body will probably change positions when it gets uncomfortable later on. I've been trying to sleep on my left (it's really hard, I've always slept on my right side - OH and I have had to change sides of the bed and everything!) and sometimes wake up on my back or right - I figure I'm doing everything I can feasibly do, so am not stressing over it at this point.
brooke Try not to worry (easier said than done I know!), I'm 18+0 and don't think I've felt anything yet. Last night I got all excited lying on my left side and thought I could feel some movement... Until I tried lying on my right side for comparison and felt the same blooming thing, pretty sure I was just feeling blood vessels or something! Could you ask to hear the heartbeat at your midwife's appointment? It's put my mind at rest so much knowing that I heard it two weeks ago. My midwife was really nice and said that if I get worried about anything they can make me an appointment so I can get checked out and hear the heartbeat, I think they are quite used to anxious women! I'm sure everything's alright, do try not to worry.
coffee Glad you had such a nice scan. Good luck to all having their scans today!