As a hiring manager I can tell you that while clubs do matter, they don't matter as much as you might think. The message on a resume that clubs send is that you are not just in it for a paycheck. You are actually interested in your career enough to join a club about it. It shows passion. Which is important. As an IT Manager I tend to hire people that have their own servers at their house and things like that, because they don't just do the job for a paycheck, the live it and love it. That said, it's a blip on a sheet of paper that might get a 3-5 second read during the first screening of resumes. That same sheet of paper might get 30 seconds on the second read if you made it through the first sweep. Consider that the average hiring manager is screening sometimes hundreds of resumes and while scanning I am looking for the experience to do the job and nothing more. Everything else I save for the interview.
In other words, it will most likely never even be noticed during a resume screening. But again, that's not to say it's not important or doesn't add to the whole if it's something you might enjoy. But in my humble opinion it doesn't add enough that you should subject yourself to an environment you find uncomfortable for a long period of time.
Are they're any pre-med clubs at your school? What about joining ROTC? There were some girls in the ROTC when I was in high school. ROTC would actually give you more tangible benefit than a club. ROTC actually provides some advanced rank and pay for those that actually join.
