Very early but possible bfp

Ok so I'm clearly not a very patient person. My cycles is 28 days exactly every month without fail. Peak ovulation was jan 15. DH & I DTD on the 12, 13, 15 & 16. Today (6 days before AF is to arrive) I have very light brownish sporting. Soooooo I couldn't stand it. Took EPT. Keeping in mind that it is a little too early to test & I took it in the afternoon when hormones aren't as high. I wasn't expecting much. However there is a very very faint second line indicating BFP. I even opened an unused one to make sure I wasn't seeing things. Nope no faint lines on unused one. So anyone have thoughts? Could it be BFP & if I test again a day or two later & in the morning that line will be darker?