im lost

Hi girls, lately I've been feeling like I'm accomplishing nothing, I'm 20, turning 21 next month. I'm going to school, but all my high school classmates will be graduating next summer and I have atleast 2 more years. Not to mention I have no idea what I want to do career wise. I'm also working on top of going to school, I make really good money, $30 an hour as opposed to the $12 that most of my friends make. But the job isn't that great.
I have one class that I'm really struggling in, I don't think I'll pass it. So I was thinking about dropping it.. but there's only 3 weeks left in my semester.. is it stupid to drop? 
I'd rather have a dropped class on my transcript then a failed class.
Any opinions or relatable stories are welcome❤️