Work vs. Clinicals

I start the pn program at Logansport Ivy Tech August 24. I was so happy to learn I got in. I'm very excited. Everything seems to be falling into place except...my job. I've been at the same job for almost 6 years. I am a city employee working the midnight shift Sat. through Wed. I almost never call in sick, actually I called in once this year. Anyway, my clinical day is Tuesday at 6:30 a.m. my shift ends at 7:00 a.m. My boss will not try to work with me here. I asked to have my days off changed, come in early so I can leave an hour early, anything. BUT they won't even get back to me on the subject. I know many people quit their job when they start the program, but I am a single mother of two children. I cannot afford to do this. I almost feel like giving up and dropping out but I've worked so hard to get to this point. It's really not fair. I don't know what to do or where to turn. It would take me at least 30 minutes to get from my job to the clinical site. Any suggestions or anyone in my situation??