ultra size wedding wear for full-figured brides

I'm 12 weeks pregnant, for some reason feeling so nervous that babies heart isn't beating. I had an ultrasound at 7 weeks, all was fine. I don't have my first hospital appointment until mid January, my GP isn't very helpful, just wondering the best place to go to hear babies heartbeat, and put my mind at ease. Don't really want to go to the hospital, if it's not necessary. Thanks ultra size wedding wear for full-figured brides