Don't worry...it's very tricky to pick up with a doppler at 11 weeks. It's like trying to pin down a fish in a fishbowl, the baby is basically swimming in there and they can still move around A LOT.

I think I heard my first one at about 15 weeks but I don't remember them trying to listen before that.

With my second I hired a doppler and I first heard him at 11 or 12 weeks - BUT it took me a good a twenty minutes, on and off, to find him the first time. No midwife or OB is going to mess around that long at 11 weeks . I had a couple of missed miscarriages so I was pretty paranoid at the time. You'll hear it at your next appointment, most likely.