Those are worthwhile opportunities if you can talk about them. I'm sure you have extracurriculars...everyone does. What do you do when you're bored? Don't tell me all you do is work and then study and sleep. I'm sure you're interested in music (maybe you play an instrument?) or maybe you are interested in art (do you draw or like museums? if so, maybe you can volunteer there for a bit to make your interest 'official') Heck, I put down meditation as one of my extracurriculars. I do enjoy meditation, and so I got involved with my university's gym center where they offer courses in meditation. ECs don't have to always demonstrate you're the greatest pharmacist that will ever walk the face of the planet. They just need to point out the you that's inside. For example, if you love reading books, maybe you've helped out at a book fair (no matter how small it is) or helped at the local library, or read books to kids, or whatever! Your interest show the adcoms who you are, not what you are.
For example, that breast cancer walk thing you've done two years in a row. It might seem small to you, but if breast cancer means that much to you, maybe you can get further involved and talk about that as an EC. That being said, make sure you cover your bases, you do need some sort of science/healthcare/pharmacy experience in either work or EC.