Miscarried 8 weeks, AF two weeks ago Positive Frer?

Ange

I’ve had a miscarriage 8 weeks ago, AF 30th of July and I did a blood test hcg was at a 5 but did a frer and it was positive? Well I think it’s positive. Doctor is saying it’s hcg from miscarriage possibly… I did a hcg dead on the 29th of July and it was 10. I thought frer can’t pick up 5hcg? It’s faint so I don’t think I am as I don’t have symptoms as before? Also AF was JUST two weeks a 2 days ago….