Missed period !?

So i was supposed to get my period at the end of the month like i always do and the <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> app told me I would get it by the 24th of May and the app is usually always right well I never got it , I took a pregnancy test today and there both negative? Should I test again or see a doctor any help would be appreciated!

Also i was on birth control depo shot but I haven’t got on it since sept 22. Can that by any reason mess up my period still ?