Some advice please I’m so lost :(

I found out I was pregnant last Tuesday worked out I should be 6 weeks 2 days BUT!.... I’ve had red blood since Saturday morning so I went to a&e; the doctor can’t get me in for a skan till Wednesday!!! She thinks I’ve had a miscarriage but delayed!? I haven’t had the big clots... she said there small chance it could still be there I really can’t see that happening?. It’s like a period