The rank bug?

Well so i wanted to play league today right and i c an update:3 and go like 10mins so then i decided to watch a video and when it finishes i c u have been promoted due to inactivity on the account and im like wtf i played some games yesterday and then i came here today and im in b1 now from s5 to b1 that is a big drop help me? I clicked ok on the thing without thinking so i don't have a picture sorryD: