Should I Take Out an Additional $5,000 in Student Loans to Focus on School?

I currently have about $8,000 in subsidized student loans, and I’m considering taking out an additional $5,000 to help cover my living expenses so I can leave my part-time job and focus on school. I’m taking 15 units this semester, including three fairly difficult classes, while also working 20–25 hours a week, and it’s becoming difficult to balance everything.
I’m thinking it may be better to prioritize school for the fall semester and then use the income from my winter/spring internship to start paying down the loans. The internship should pay around $40 an hour, so I’d have a much better opportunity to reduce the loan balance once I’m working those hours.