Early spotting.

Hello!

I am currently 6 weeks and 6 days (according to this app, I have not had my ultrasound yet to confirm.) I have had 2 days that I have had some light spotting. It was mostly just pink but there was some red with it. Of course I called my doctor and they had me come in for a blood draw. I am pretty sure I will need to go back in a couple days to make sure things are rising like they should be, but my question is has any one had some spotting and remained pregnant? I am having a hard time believing that this pregnancy will continue and it is making me slightly short tempered and anxious waiting to find out.