Opinions needed! Please

Raina

Okay so about 2 weeks ago I confirmed pregnancy by dr(blood test, and urine), but before that I had a positive at home. I took a pregnancy test this morning (because I just don’t feel pregnant) and it was negative. Before confirming it with dr I had 6 days of what dr said was implantation bleeding. Is there any way possible I could have had a miscarriage instead? My hcg level was low the dr said. pregnancy didn’t show up on ultrasound either?