Was told I had a miscarriage about 8 days ago , had bad pains and quite a bit of bleedin , was around 4/6 weeks ? Confused , help !!!!?

When I done my first pregnancy test the line was very faint and that was about 3 days before my period was due but it was a positive had a scan and doctor seen a tiny sac and a tinier blob , blood test showed my hcg was very high for so early on , a few days later I had more blood tests and my hormone level went donwn but was still very high for early days but obviously a miscarriage , another few days later hospital checked my wee and test still positive and now I have done one today , 8 days later and it came up crystal clear within a second that the test is very much still positive ? My first test took me about 15 minutes to finally see a faint line , I am so confused