Okay listen to this...
I'm attending a university now (yep, I'm old), but to do that, I had to take 20 credits during summer term! I'm not sure if all of you are familiar with credits, but that's A LOT of homework. I was only getting six hours of sleep on average, and during finals, I went through stretches of being awake and going for 48 hours! I did that more than once, too! Awful! Never again! :)