Work

So, I work at taco bell. I have been working there since July 2012 right after I turned 16, so I got my diagnosis about 6 months after I started working. I was working at one store for about a year, then I moved & transferred to another store the next summer & have been working here since. I never told my manager at the first store that I was diagnosed, mainly because I didn't see it as a big deal at the time, because I didn't know anything about it. But I have told my manager at the store I am working at now since I realized how much it actually gets in the way of my job (scheduling limitations, having to call out of work, going home early due to being sick, etc.) Taco bell is a very fast-paced job & requires A LOT of physical exertion, which can be very hard for me. There have been times when I've come home & couldn't even get out of my car because my knees were so bad. I have never cried at work because of the pain, but I've come pretty close many times. Another thing about t-bell is that since it's a big corporation, it's not very sympathetic to people with these kinds of limitations. That's another reason I never told the first store, because teenagers are so disposable that well, why would they work to accommodate me when there are a hundred other healthy teenagers that want a job? The store I am at now is not working with me either, & that is so frustrating to me. I have told them about my condition a million times, it seems & they just don't care. My hours are crazy: working past midnight on weekends, working 11 hour shifts, working late on weeknights when I have school the next morning. & even though I have asked them to respect the limitations & have written notes to my boss about schedule changes, they are still not respected. I need my job because I have things that I pay for monthly & any other job I would get right now would be the same story, since I am under 18 & I have no college degree, or even a high school diploma right now. I don't know if enough people follow my blog yet to get an answer to this question but I'm just wondering what I should do about all of this. I'm planning on quitting in June once I turn 18, because then the job market will open up a little bit more for me, but what do I do before then?