We started testing 10DPO - we tested 6 times (utterly obsessive I know) - each test showed positive but the last was very faint...
She had sore breasts, nausea, and we were so excited.
The blood tests showed HCG levels of 5... That's too low to be a viable pregnancy. It appears that we achieved fertilisation, and even implantation but it didn't 'take'
We have one more try.