Fingers crossed for tomorrow Sharon.
I would say home dopplers are OK in later pregnancy but at this early stage it is so small and difficult to pick up you are unlikely to be listening to baby's heartbeat, this is why midwifes don't listen in until much later in pregnancy and people often use them to reassure themselves but other than hearing a heartbeat it doesn't tell you anything else about the rhythm where as the professionals can tell so much more from listening in such as if they baby is distressed and things. I however did buy one in my first pregnancy and found it lovely a relaxing listening to the heartbeat chug along but that was after my 20 week scan and I would never rely on it if I felt something wasn't right I would get a professional to check you over even if they just use a Doppler quickly and give reassurance.