First piece of advice: Stay at Uni and finish!
Second piece of advice: Just take it as it comes.
I read Chemistry at Soton and I an now doing my ATPL's. But I've seen so many 18 yearold fellow ATPL students with stars in their eyes and castles in the sky. They are in for a shock when it comes to the real world. I recommend you see if aviation is really what you want. Take a trail lesson and see how you like it. Do a PPL and see if you can hack it. There was one lad with us who went for the ab-intio course all paid up, and after he stepped off his first flight, he decided it wasnt what he expected (it aint gonna be Top Gun). That was the end of him. So many naive youths rush into things like this, and it isnt something to rush into.