More importantly, you may not qualify for admission to the bar or even be permitted to sit for the exam without completing your undergraduate work. Massachusetts' bar exam qualifications rules state:
"Rule 3.2 - College. Each applicant shall have completed the work acceptable for a bachelor's degree in a college or university, or have received an equivalent education in the opinion of the Board."
On the other hand, IL requires a high school diploma and a JD from an ABA accredited school, but does not explicitly require a bachelors. So you need to check the bar admission rules of the state(s) you are interested in practicing in.
I would be worried about how your lack of a college degree would affect your job prospects as an attorney. Not having an undergrad degree on your resume or application form would be a huge red flag to employers. Considering the over-abundance of lawyers on the market and decreasing job opportunities, you don't want something like this that might prevent you from even having a chance at an interview. If you do get an interview, expect to be grilled on it.
I definitely understand that it would suck to go through an additional 3 years of undergrad at this stage in your life. Suck it up
Most lawyers/law students have, you can too! In this day and age, I think a bachelors would improve your job prospects vastly, whether or not you end up trying the lawyer route. Good luck on your endeavors.