Rose and InDreamland so sorry that you're struggling, I don't know what to say but it's shit. I really hope you both get your BFPs soon 
Oh no Buggles, I hope everything is OK for your sister. What a rubbish few days she's had. Did she have the nuchal test at 12 weeks and all looked fine? In Malaysia its pretty standard to get the NIPT done at 10 weeks to look for chromosome abnormalities so if we get that far we'll do that.
I feel the same as you about this BFP. I'm trying to stay positive anyway because I don't want to spend the next 5 weeks miserable only for it to end badly again. Even if I try and not get excited or attached I'll still be devastated if it ends in MC again so may as well try and enjoy it while it lasts.
I did another FRER yesterday and the line is definitely darker. Going to wait till the weekend and do a CB digital to confirm (last pregnancy I got 2-3 weeks at 12 dpo i.e. today but given how the line was still fairly light on the FRER yesterday I think my HCG must be lower this time).