It's past the add/drop period, yes? If that's the case, it will show up on your transcript as a W. It doesn't affect your GPA, but you won't get the credit for it and it will be permanently on your transcript.
You'll probably be forced to live off campus next semester, if you choose not to take another class in its place.
Talk to your advisor, they can help you sort everything out.
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Educators destroy your brain,
but you don't know, so why care?
Fagotto