Faint line, help.

Hey guys; I'm new to this. I think I'm currently 12DPO and have had a lot of BPNs (evening one this morning - CB digital) however I've started to have AF cramps as I'm due in tomorrow so thought I might aswell use my last test as I'm out and this happened.. Am I the only one who can see one of those faint lines where you have to hold it an an angle in a certain light! Please comment let me know what you can see!