This happened last week, and before I went I just thought the MW would look for a heartbeat. She didn't so I asked why not, and she said until 24weeks it can be difficult to find and she didn't want to panic me. Then she asked me if she should try and I said no, didn't want to cause a fuss or get panicky if she couldn't find it.
But since then, 2 friends of mine said their MWs automatically checked at the ir 16wk appointments. Did yours? Should I have insisted? She did urine and blood pressure, which were both fine. And I'm starting to feel the odd flutter, which is reassuring.