Waiting for first appointment is hell

I just found out two days ago that I'm pregnant. I just took the test on a whim and the only reason I took it was because my period was 3 weeks late. When I took tests the day AF was due and even the week after, they were negative. I've had no other symptoms of pregnancy but 4 tests now have been a blazing positive. According to my last period I'm over 8 weeks now. But I would have had a positive test sooner if I was, so I think I ovulated later. My first appointment is January 16th. I'm so nervous that they're going to tell me that nothing is in there, and that the positive tests were a fluke or something. With my first two kids I had obvious symptoms by 5 weeks, including nausea, exhaustion, and headaches. I have absolutely NO symptoms here. I wish my appointment was today so I just knew!