I'm starting my Midwifery degree in May and, like you, did not have the qualifications necessary for university entry.
Have you thought about undertaking an Access course? They are specifically designed for entry into university, and will usually cover all the subjects that you need, and at the right level. Mine covered Level 2 (GCSE level) Maths and English, as well as Human Biology, Psychology and Sociology at Level 3 (A Level).
As well as the academic side, the Access course will also prepare you for degree level study, and you will learn about essay writing, researching, referencing, academic skills and time management.
Check out the Access to HE website for information about colleges in your area:-
http://www.accesstohe.ac.uk/, or you can do an Access course online with the DLC if you'd prefer to study from home:-
http://www.distancelearningcentre.com/courses. htm
Whilst NVQs are good, some universities prefer the more 'traditional' qualifications such as A Levels and Access, as they tend to have a slightly more academic base.
Before you commit to any course, though, I'd recommend checking with your chosen uni(s) that you'll achieve all the qualifications you need.
Hope that helps; the very best of luck! x