Oh no I missed my class. Now what should I do?

Today something is wrong with my Whatsapp notifications because usually in our college group on Whatsapp they send the Zoom link for class but today for some reason notifications didn't come at all. Now when I checked my Whatsapp properly I saw I had a class on 10:15 am and now its 10:35 am so I missed the class. I am really feeling kinda scared now. What should I do?