I am in the same boat. I have a Bachelor's degree in Government and was on the way to entering law school until a few months of deep self-reflection recently turned my career interests towards nursing. Now, I am scrambling to enroll for the pre-req courses at a local community college but may run into a wall with the aid as well (due to the college's deadlines for including Fin Aid as payment for late registration), which may push back my ability to start the courses until January. .
In any case, as a second-degree student, you aren't typically eligible for typical FinAid pkgs, grants or institutional scholarships, especially if you are just taking one-off credits and opposed to entering a program. However, the government allows Federal Direct Loans and Federal Work-Study only, for students completing pre-req coursework for the sole purpose of qualifying for another degree-seeking program. (I think you have to get the schools that you're applying to to provide a letter to the pre-req school as proof of what you're doing). This aid can only be used for a maximum of 12 MONTHS, and only once in your lifetime, so you have to be sure to take the pre-reqs continuously and to pass them in that allotted time. This specific loan prog is a manual program though,(meaning the systems won't automatically recognize that this is what you are doing.), so the fin aid office at the school at which you are taking the pre-reqs has to apply for it FOR you.
Try asking the Fin Aid office about this option and see if it is available, because every school does not participate. (Junior colleges often have different guidelines than typical 4yr universities.) Hope this helps! I'm still researching options myself! I work full-time, but my bills make it almost impossible to pay for these courses in such a quick time frame, so I completely understand your frustrations. Best of luck!