Choose Life!
...oh please!
This is your life and your choice.....why are you even going to university, if you can´t even make your mind up which degree you want to do!
Why not do something that REALLY interests you, rather than a degree for just the title as it has the word Áircraft´in the title!
Study whats right for you...get good grades....get a decent job to earn some dosh and maybe then, you might be able to secure some money to embark on your ATPL training! Good luck...you´ll need it!