HCG Line Progression

I cannot stop taking tests since getting the very faintest vvvvvvfl 9 DPO. AF is technically due tomorrow but I don't think she's coming! Today is 13 DPO! Not to mention that nausea has been hitting hard already!

Who else enjoys seeing the line progression?! Even with the OPKs I needing to stop myself from peeing on too many in a day