alarms won’t go off ?

Lately, my alarms will do one of two things.

1. Act like I never set them in the first place, when I go into the clock app they’re turned off.
2. Act like they’re going off, but with no sound. The light will flash and the screen will light up with the snooze/stop options.

It would do this even when my phone was 100% updated (it currently isn’t). My volume is up, my silent mode off. I don’t even close out of the clock app anymore so I can check to make sure my alarms are still physically on in the middle of the night.

Im going to lose my job if I keep waking up late. I need the alarms to work.