I had a few false starts with uni and can very much relate to everyone's stories. In the end I spent 6 years there and did 2 degrees, both of which are fairly useless! But it does give me immense satisfaction knowing that I finished them, even when it was very difficult. It's a really good point about postgrad study - I have heaps and heaps of options open to me now in terms of future study and career options, because I have finished a degree. In the scheme of things, 4 subjects isn't a huge amount - could you do them one at a time over the next couple of years? That way, uni isn't the 'main thing' in your life, and you are just chomping away at it all?

But in the end you're the one who has to live with your decision, so it's all totally up to you - best of luck with working out what you want hun.