Horribly Confused

Okay So According To Glow I Was Supposed To Get My Period Today But Nothing Yet. I'm Not Sure Whether To Be Excited Or What To Feel I Was On The Depo For 2 Years And Was Told It Could Take A While For My Periods To Regulate Themselves. I Took A pregnancy test 4 Days Ago (My Breasts Were EXTREMELY Sore And I Felt Nauseous) And It Was A BFN No Faint Lines (I Starred At It For Like 30 Minutes) What Should I Do