We had a little thing-y (I believe that's the official term ) that picks up and amplifies the HB (it came with earphones). It wasn't great until later in the pg though, depending on how your placenta is lying and where baby is. My ob showed us how to position it (and how to tell the difference between my HB, cord pulsing and baby's HB). I picked it up for about $10 at a baby market, I think it was from the US originally. If I thought it would be useful I'd send it to you, but I don't remember it being much good until after 20 wks.

It's understandable you're anxious.