Just a little anxious...

So I will be 12 week on Friday and I still haven’t seen my OB I have made an appointment when I was about 7 weeks and my doctor was booked up all the way until the end of June ... I am just very anxious and nervous that I still haven’t heard the babies heart beat ... at times I am really worried because I have had miscarriages before both of my pregnancies this is my third baby and I am just a little worried... Any of you ladies still haven’t seen your OB yet ?