what what has happened. are you tensed about something
please share, may be I can help
If you are interested in night study... do it
try to sum up with YouTube revision or short version of particular topic n if it already done by you n then repeat n revise .. make sure you are studying n don't forget to only watch the necessary content for YouTube incase u have a plan to study there
U don't need to tense .. study but make sure u sleep before exam .. Studying overnight is fine but sleeping after the study is very imp .. it helps u to memorize .. but studying is important not only sleeping .. Cheer up .. no worries .. u can do it ..