How rude would it be to quit without 2 weeks?

So I have two problems, one is that I cannot stand the my sm (she’s unprofessional and is literally the biggest shit talker in the world. Literally talks shit and rags on everyone - workers, customers, and she makes very stereotypical comments about the physical appearance of our comments) and very and the company as a whole, second is I have very bad chronic migraines. I was already thinking of quitting but the job makes my migraines so bad I don’t think I’ll be able to work there another 2 weeks after I hand in my letter. How rude would it be to quit without any notice?