What can I do with a bachelor’s degree in Nanotechnology?

I’ve completed 2 years of a nanotechnology course, with 2 more years left to finish. I’ve come to realise that there aren’t any jobs available, and the salary for a researcher in nanotechnology is very low for the amount of effort. I considered changing to Chemical Engineering, as it is a more general field, which attracts a high salary, especially in Western Australia where I live. The probably is, this would require me to do 3.5 more years of study to get a bachelors in chemical engineering. The course is 4 years, and although ive completed 2 years of nanotechnology, I almost have to start from scratch (minus a semester). I’ve considered completing my nanotechnology degree, and applying for some kind of post-graduate course. The only post-graduate degree that will give me a completely different career path is medicine. I want to be able to help people, and make a difference, but nearly everybody i’ve talked to has told me to stay away from medicine. Are there any other post-grad courses that I could do? I have a strong interest in science and want to be able to make a difference, and also would like to earn more than an auto-mechanic.

Should i just do chemical engineering and accept my wasted years, or do a post-grad degree?