A lot of times, women do not have the dates correct or their cycles will have changed when they are trying to conceive - and they will go from being super regular to irregular, due to stress. So their dates will be a little off.
Knowing this, doctors will say come back and we'll test again in a week. By then, you'll either have gotten your period, or you'll test positive.
If you've tested every day since you thought you would get it and today you finally tested positive, then likely your hormone traces were too low to be picked up. You could test again tomorrow (should be a more darker line etc.) or just wait till you go in (that's what I would probably do, to be sure and not drive yourself nuts).
It's hard to say. I hope you are :)
You mean you only see an OBGYN once you are pregnant (confirmed) is that it? Hopefully that will be the case soon. Best to you