Pregnant or no

I had my last period December the 28-31. I'm pretty regular. I expected my next period to be January 23rd or 24th. I am 12 days late and today I experienced very light brown discharge but then it went away.  I have taken 2 pregnancy test. One on Jan 26th (at night) BFN. Next one was one Jan 29th (first pee) also BFN. Should I test again in the morning? Or wait it out for AF?