As said above, schools are more interested in what you take from an experience and how you can relate that experience to being a doctor. So that doesn't necessarily mean it has to be directly medical. Maybe at this point in time the best thing to do would be finding some volunteering that you could take part in, places are always happy for the support.
I personally volunteered for 2 years at my local nursing home, just on a Sunday during term time and sometimes for an extended time during holidays. I think this was something that really helped in my application, more than the work experience I had. 2 years is a lot though, and I'm not saying you need to do anything for that long, but also not saying you shouldn't.