Possibly a miscarriage

Sasha

Ok so I started bleeding Friday morning quite badly so I was booked in for an emergency scan today scan showed I was 4weeks with a sac but no baby as it’s too early to see anything on ultrasound anyway my app says I should be 6weeks 1 day dates could be wrong? But I went from my ovulation to missed period then changed it to pregnant I also took a test and it still says positive I think what I’m trying to say is I’m so confused about how I’m bleeding with stringy clots and still showing positive tests? Will post a pic of the test I’ve taken just because once again I’m just so confused :( been wanting to get pregnant for a while now after a miscarriage in October last year I pray this is my little miracle