Question about dropping a course

[curiously42]

Throughout my undergrad career, I've been ahead of where I need to be - credit-wise - by an entire year.  Because I wanted to make my time here last (I really enjoy college, and didn't want to end up 3 years in only to realize that I've got nothing left to do), I thought it would be a good idea to double major.  Problem is, I could never figure out what I wanted my second major to be.  The only thing that's really stuck is psychology, and that's what I'd like to pursue in graduate school.  Aside from that, I've also tried English, Classics, and - most recently - premed (which I realize isn't technically a major, but it IS still extra work - the idea of psychiatry and neurology appealed to me).  As it turns out, though, while I am a good writer, I've never been fond of literature; Classics fell through because history in large doses bores me...and pre-med...well, it turns out I'm not as much of a science person as I thought I was.  Unfortunately, I realized this too late, and am currently taking way too many credits, all of which are science, plus marching band.  And I'm not doing as well as I'd like to be.  I think I could pull off some decent grades if I just got rid of one of the classes, thereby freeing up enough time for me to be able to put in the necessary amount of studying.  However, I ALSO know a W looks not-so-hot on a transcript.  But since I don't really NEED any of the classes I'm taking for psychology graduate school (which I now realize I should have just pursued all on its lonesome since the beginning, instead of trying to be an overachiever), it seems like it might not make too bad of an impact, as I feel like I've got pretty good reasons for wanting to drop it - reasons that don't involve me being an incompetent slacker.

So what should I do?  Should I stick it out with all of my classes, or should I make my life easier by dropping one and getting a W out of it?