The actual requirement is "clinical experience" and is typically defined as
working with patients. What you've been doing with direct patient care is sufficient. It doesn't matter if it's paid or volunteer work.
However, I would like to continue to emphasize
@Doctor Dream 's second point in that it is the quality of the experience and its contribution to your work as a physician that is important about this experience. Your experience seems to be better tailored for someone getting into nursing (and interviewers may ask about this), so you have to spin this experience into something that'll help you establish your motivation to become a physician.