I had the exact same feeling around the exact same time, although a horrible dream set me off. I rang to get an earlier appt with the OB and when the receptionist asked more as to why, I broke down in tears and they told me not to see the OB but to come straight up to the hospital and one of the midwives will see me. The midwife was lovely and told me it was normal to feel like that and then got the Doppler out, massive relief! Is there a GP that bulk bills as they should have a Doppler as well and I'm sure they'd want to put your mind at ease.