Last iOS Update - Ringtone and Alert Volume

I am a nursing student so I rely on my alarm clock to get to clinical on time since it is a very strict requirement. After I downloaded the last iOS update on my iPhone I set up my alarm like as usual and it turns out that it was not even making my phone vibrate. I ended up waking up an hour late. This has gotten me in trouble with the strict policies of my nursing program. There is a big chance I will be dismissed from the program since this is not a credible excuse for them as it could see how they would believe I am making this up.

A day later, since I thought I might have done something wrong I set up my alarm and made sure it was set for the right time and my phone was not in ringer mode. I could hear sounds from apps, etc. Later on, I discovered that my 'ringtone and alert volume' on the settings had the sound turned all the way down. I never touch those settings and there were no changes in my phone other than my alarm not making a sound.

I need to find out of this issue was related to the update since this could be my only way to appeal my tardy on my program. Thank you!