Am I pregnant?

I took a pregnancy test yesterday when I got home from work (first response - digital) because over the past few weeks I have been feeling “off” (tired, nauseous, emotional etc). I am also 4 days late. It was positive. Called the dr made an appointment for two weeks.

I just woke up (3am) and I had bleeding overnight, no clotting and it has stopped now. I took another test and it says negative now. Could I of had a chemical pregnancy and it shows negative already?