Sorry to hear about troubles with school.
I would certainly mention your medical condition to your professors, but a professor may not be able to do too much to accommodate you. A better tack will be to seek out student support services, which should be able to document your medical condition and limitations and then you can present this documentation to your professors.
Although meeting with a student retention specialist probably won't hurt, you should make sure this person understands that your problem isn't one of academic preparedness and is medical in nature.
Too, if I'm not mistaken, you should be able to swing a one-time exemption on financial aid.
Good luck.