Original question:
Should I come clean after I accepted the job offer? Feels miserable
and I understand the consequences are coming back to me I but really
need this job. Plus, I do intend to finish my bachelor.
Withdraw your application, if you have made one. You don't need this job if it lands you in jail and marks you as a criminal at the start of your career. When considering the worst that can happen if your lie is discovered, include in your deliberations not just being fired, but a prison sentence and a criminal record for fraud, which are not good on your resume/CV. In many (if not most) jurisdictions, lying about qualifications or experience on a CV or resume to get a job may be fraud, a criminal offence.
A man in Britain claimed to have a BSc, an MBA, and an MSc, and to be the author of an academic paper written by somebody else. He got a job paying £120,000 a year plus car package and relocation allowance. He was sent to jail for 12 months.
http://www.dailymail.co.uk/news/article-5175631/Executive-jailed-lying-CV-inventing-degrees.html
Another appointee to senior positions in the National Health Service (earned £1 million over 10 years) got two years in prison.
https://www.theguardian.com/society/2017/mar/06/jon-andrewes-nhs-jailed
A less serious offence (only lied about 1 degree, didn't even get the job) got a 6 month suspended sentence, and was ordered to pay £9,600 costs and do 150 hours unpaid community work.
https://www.personneltoday.com/hr/nhs-hr-manager-who-lied-on-cv-ordered-to-pay-9600-in-costs/
British fraud prevention officers have sent a new guide to every university in the country warning students of the consequences of inflating their degree grade, doctoring their employment history or making up personal references.
Some students have been jailed for six months for lying on job application forms, it emerged, but the offence carries a maximum sentence of up to 10 years in the most serious cases.
https://www.telegraph.co.uk/education/educationnews/10941476/Students-threatened-with-jail-for-telling-white-lies-on-CVs.html
Another point: Apart from the subject knowledge, a bachelor's degree is evidence to an employer that you have successfully stuck at, and completed, a three or four year personal project. You will have learned things about yourself, and gained skills from that. If you lie your way into a job, it may become painfully apparent to your employer and colleagues that you haven't learned those things and don't have those skills. Then the questions will start. Directed to you and the university you said awarded you a degree.