Positive to negative

Sabrina

I got a positive pregnancy a couple of weeks ago back in December but I decided to test again for my anxiety and it says its negative. I did have some light bleeding According to the app I’m 6 weeks today. I don’t go for my 1st prenatal appointment until the 14th of this month. Did I bleed/spot for implantation or something else? What is going on Am I still pregnant, was it a false positive, miscarriage? My mind is going crazy.