I have had 2 miscarriages this year. This is my 3rd pregnancy. I am 5w,3d. My first appt. is Tuesday at 5w,6d. I am really wanting to have an ultrasound ASAP, but really want to see the heartbeat to be reassured. If I had an ultrasound later in the week, once I'm over 6 weeks, would I be likely to see a heartbeat? Thanks.