Working two full time jobs!

So I start my second job tomorrow overnight and I’m pretty nervous. As a stocker, I’m the only female in the department that makes me feel a little uncomfortable. Hours are from 12-8:30am and start my other job 11-8pm I don’t know how I’ll handle it but it’s the only way for me to make it. I’m tired of living paycheck to paycheck. I have no kids, I’m 34. I recently broke up my engagement of 3yrs. I’m hurting bad but it’s my only way to stay focused and busy. Any recommendations out there how to balance two full time jobs???? What are good vitamins to take to stay alert and wide awake.