Failing a college cl that should be easy, its past withdraw deadline and i dont know what to do :(?

its my first semester in a university and im totally flipping out! im taking a greek, linguistics, dance, and "art of listening to music cl", and somehow im headed toward failing the music cl! when i signed up for it it was basically a filler that fit into my schedule, and i thought it would be the easiest thing (which it is if i had kept up), so i put it on the back burner. now, with like 2 1/2 weeks left of school i realize i've missed 3 of the 9 online quizzes and a deadline for a concert of my choice that i was supposed to attend... i emailed the teacher whose a really nice guy and he asked how i managed to miss them when i knew they were on the schedule, haven't responded to that yet, i feel like there really isn't an exuse. so today i figured i could just withdraw, but the dealine was over a week ago... and i really don't want to fail this cl and eff up my gpa right from the begining, the other cles im getting 2 a's and a b+, but the dance is p/fail so that doesn't help much... and i don't know what i should do!!! should i beg the professor to have mercy on my soul?! which is prolly not gonna happen, i prolly couldn't get an exception W, would i somehow be able to get an incomplete or something? and how would i ask the professor for that? its totally my fault and i feel horrible... thank you sooo much for any advice!