jolly sorry for what you are going through. In my prayers.
sheldon Hope your scan went well or at least not badly.
pebs I understand it hard to be positive in that situation. Hang in there and hopefully the scan will be good and the worry will be forgotten.
Went to my appt yesterday and GP said he was unconvinced and I should come back in 2 weeks as line was faint on his test too. I asked to see it and it was a million times darker than the one I did. Could clearly see it, no squinting or holding it to the light scenario! Managed to get him to at least ask about blood test at end of appt - conviced him that might be feint due to low levels and not that I'm not pregnant and that he might finally be able to confirm is mcs are due to insufficient levels. Not sure but I am gathering that there are expected levels as certain stages so it is comparatible. Ladies on here might be able to confirm/deny that.
Anyway, went for blood test today. Got to wait a week for results but at I'm a lot more positive about it having seen a much darker line at GPs yesterday. Lady that took blood was so nice as well. Made me feel so much more relaxed. She kept telling me everything is going to be fine, this tiime will work. its the furtherst I have come in finding out why things go wrong so maybe we can make it work this time round.
Sincerley sorry to anyone who this upsets and who are having a much worse time than me. Hope it all comes good for everyone. 
On a completely different note - I got a job offer today. Starting Monday so will be something to keep my mind of things and keep busy 