Do confused someone help :)

So I had a miscarriage +3 weeks ago..  Medically assisted and bled for two days then that was it. They told me to do a test in 3 weeks..  I did one this morning -  positive. 

Went to the hospital were there test said negative..  They took my bloods. 

I received a call a little while ago saying my bloods shower positive my hcg level was 186 my progesterone 9.6 her words were 'whatever is there won't last' 

The doctor said I have no signs of infection or left over pregnancy..  So was she telling me im going to miscarry again?  Are these levels not normal?  I have to go back in a week to have another blood test,  but I'm really confused and not sure what's going on  

Sitting at home googling hcg and progesterone levels and I don't understand any help would be appreciated. 

Test said 1-2 weeks.  As I had a miscarriage I havent had a period so I'm not sure how it works x