I think Psychology or Sociology would be an excellent choice for a Health Care profession.
I did A'level Psychology 6 years ago, and now having completed my degree and in a good job, Psychology A'level gives you an excellent knowledge of researching, analysing, evaluating, report writing.... skills that will help you at university, help you when you are looking for a job, and help you when you start working...
Then you also have the academic knowledge of Psychology 'the mind - why people do certain things' or
Sociology (study of society) 'patterns of social relationships, social action, and culture'...
I think they are both good choices. When choosing my A'level i went one step further and looked at UCAS to see what qualifications/subjects university's required for my desired degree choice... have a look at that as well.
Go with that you are interested in!! It pays off - you don't want to study for something you have no interest in, if your passionate about Sociology/Psychology go for it - you'll likely to get better grades, if you interested the subject as you will WANT to learn about it...
Good luck hun x