Apparently i am an oppisite girl- the 20miu tests i have say they are sensivte and i got a faint line with the 10miu and a BFP with the 20 miu with the same FMU, i dont get it myself!! I am pretty sure that was about 10-12 dpo, but everyone else i have talked to has had the opposite result- they say the 10miu is more senssitive!!

Good luck, your symptoms sound positive!!