can I have some advise please on a possible miscarriage x

Lois
Right. Long story. 
I came off the pill on 27th sept and bled from 1oct - 3rd oct. 
I felt a little sick around the 25th October so I took a cheap test. But negative. 
I then went and bought some first response and they all came back positive on the 25th and the 26th but quite faint! (you'll get that I'm obsessed with testing lol) 
Thursday 27th I went to the docs and her test was negative. Urine test. But she said not to worry as I've had so many postives and it's very early. 
Friday the 28th I got a positive digital also. 
Sunday 30th I took a clear blue digital which I wanted to give to my Nan as a surprise it said 1-2 weeks which would be about right meaning 3-4. 
The doctor asked me to do another anorher test at home yesterday after being a week since I saw her which I did. BFP
I also did another digital to show my mum. That still said 1-2 weeks. I went to the docs yesterday and she did another urine test and it's still showing negative so she told me she thinks I'm having a missed misscarriage as her test should be positive by now after 7 days but when I got home I was so upset I did another one to see how strong it was. Again. Massive positive. 
I'm so confused. She did a enteral examination with her hand but didn't say anything so am unsure as too what she was feeling for so early on? I should be about 4-5 weeks.
Sorry for the essay I'm very down and would love some advise. 
I have a blood test booked which will confirm it
Thanks xx