Switching Gears

I'm a senior in an liberal arts college (among the top 3), majoring in biology and women and gender studies. For the first 2 years of college and even before college I thought I wanted to be a research scientist in biology. But after several internships and taking science courses I found myself doing a mediocre job and my interest dwindled. I feel myself drawn to humanities more. I'm thinking I have two options, first is to go straight to grad school, second is to take some years off working and gain some experiences. What should I do?

Also see: Graduate School: Attend Now or Wait a Few Years?
Switching PhD Programs
Career Change