Congratulations on your boys, Dandi and Babylove! I actually really wanted another boy, and was a little afraid when I heard I was having a girl, but came around to the idea pretty quickly.
I THOUGHT that I found the heartbeat with my doppler VERY easily the two times I tried yesterday. However, the rate seemed a little low, so I did some research and realized that what I had actually heard was the whoosh-whoosh sounds of blood flow through the placenta. I tried again today and, it took a few minutes, but I found the more distinct galloping horse pattern of the heartbeat at a faster rate. She kept moving away (hence my not wanting to harass her), but I found it a few more times before I put the thing away.
I also tried really hard not to buy one, but I think I will save me more stress than it will cause. I KNOW this baby will not be as active as my son, who first kicked me at 12 weeks and has literally not stopped moving since - even when he's sleeping. Nurses and doctors always commented during scans. Strangers on the street would look at my belly and ask if I was pregnant with Michael Flatly, Lord of the Dance. My ObGyn has already given me a pamphlet about "normal" fetal movements bc he said he knew I might worry. I knew I probably would anyway, and figured being able to hear the heartbeat would help. I knew I didn't want to get one too early, though. I also would have held off if the doctor hadn't found it quickly at my last appt.