cd 39 & no af

Today is cd 39 for me and 4 days past original start of af & still nothing . I've tested & got one vvvfl and a negative and I just did a pink dye test it looks like a very faint line but I'm pretty sure I'm imagining it. Me and my SO had sex everyday of my ovulation window which is now changing becuase af is late. Is there still a possibility? Or what could possibly be going on? Maybe stress because I want to be so bad? I'm trying to keep positivity but is hard.