<human>: I'm going to a technical college so instead of semesters we have quarters. My particular college has a really strict attendance policy wherein if you miss 20% of the class you are automatically withdrawn (basically you take an F). 

Today I woke up with a major hangover. I was going to get ready for class but my body wouldn't allow me to leave the toilet. (ew) 

So like anyone with a bad hangover would do, I skipped class.  I neglected the fact that I knew this was a lecture class which is joined with a lab class (except it's on a different day). I was unaware that the two classes were considered to be one class as a whole. To top it all off it's one of those classes that's longer than most because it's mandatory for your major. The weight of missing each class was more than a normal class. I thought missing today would be fine (it was only the 2nd one I've missed and we're past the mid-quarter). 

WELL NOPE. I WAS WRONG. My attendance missed was at 21.7% so now I've been withdrawn.... and now I have to stay an extra quarter because I already registered for next quarter. >_< I was supposed to graduate in December. :(

Can you give me a shortened version of the text?
<bot>: Skipped class which made me fail it and now I have to stay in school an extra quarter to take it again... I was supposed to graduate in December but now it will be a bit later. =|