Hey Ellen.maccy :-) When it comes to work experience, quality is much more important than quantity. The experience that you have done so far is more than enough (so good job!) to form the basis of a strong personal statement and application, you just need to make sure that you present your experiences in an appealing way.
In your personal statement, nobody wants to read a long lists of every single patient/disease you have seen, better to pick a few anecdotal cases and really reflect on them. In all of your work experience constantly ask yourself questions like: how is this doctor behaving a way that I would like to emulate/avoid emulating? How might this patient/person feel at this point? Have I seen any examples of the importance of leadership/teamwork/compassion/empathy/evidence-based medicine/hard work? What are the challenges in this job and how would I deal with them? What are the qualities do patients appreciate the most in doctors? How might the medical practice I am seeing at the moment be different other places in the world/the past in this country? etc. etc Then be prepared to write and speak confidently and in detail about these reflections in your personal statement and interview.
Therefore don't fret at all about not having enough work experience, medical schools are far more impressed by seeing that you have really engaged and learned from whatever experience you have done than the quantity.
Best of luck,
Alex, 4th year UCL medic
6med