Just want to know the truth

Calling the doctor supposed to be a sigh of relief, but in my case not so much. I'm 2 weeks and a day late. At first I was super excited thinking I was pregnant then u began to test.... and to test and to test and on and on. And every single test was a bfn so in not sure if I'm pregnant or if something is wrong. I called my obgyn this morning and explained to them what's going on and they told me to wait two more weeks and if no AF give them a call. Now I was to wait. Why do you have to be so far off in order to take action. I really do hope I am pregnant but should I have a bfp by now if in was?? What's you ladies experience?