<human>: Can you give me the gist of the text in a nutshell?

Two years ago I struggled with a drug addiction. I was a junior marketing major and was expelled due to my substance use. I have gone through rehab and have been sober from drugs for about a year and a half now. I attended cosmetology school and am working full time in a salon.

The trouble is that I am already having trouble with my joints. I have already had cortisone shots in one shoulder due to tendonitis and now I feel my other shoulder going too. I've been speaking with a number of stylists who have been in the industry for decades and they keep telling me it will only get worse. They are burned out and often struggling with physical ailments. For now I am physically able to work enough hours to live comfortably, but I am afraid that in a few years I won't physically be able to do this. 

So now I am considering going back to school for an associate's degree in radiology. My grades in college were all A's and a few B+'s. I was salutatorian of my high school class. But I royally fucked up once I got to college and was expelled. How do you go back after this? I'm obviously not looking to return to the same college, but rather a community college. The radiology program is much more competitive than others and I'm worried my past will totally bar me from getting a degree (even in something less competitive). Would any of my previous credits transfer from several years ago if I got in? Has anyone been through this or have any input?
<bot>: Got expelled from college for drug use, got clean and became a hairdresser. My body is now giving out on me and I want to go back and get a degree. Advice?