There is a certain date by which if you were to drop your classes, you won't get a W or F ( withdrawal or fail ). After that there is another time table after which if you were to drop your class, you'd get a W. After the date for dropping your classes has passed, you won't get a W, you'll get a F. If your semester started on January then I'm pretty positive that if you were to drop your classes now, you'll get a F.