I
think UQ only require a hurdle GPA of 5.0 for graduates from their own university? And you will have 2.5 years to pull that up a bit anyway.
I definitely, personally, wouldn't be advising starting a whole new degree/university, especially after only a single semester and with zero guarantee that anything would be different anyway, I think you'd be much better off committing to what you're doing (though, biomed... hmmm) or you'll be forever chasing your tail, but
Crow will have more definite advice.
ETA: Why biomed?