Would 3 weeks off work as a nurse be long enough to recover from breast lift with augmentation?

I appreciate your question.  
Typically, my guideline is, the first week is the hardest. By the second week you feel better, at four weeks you feel 100% and at six weeks you can go back to complete normal routines and exercising.  
Four days after surgery, I would be careful as you are still at risk for bleeding. If you are taking any pain medication, I would not drink alcohol.  With my 'Schwartz Rapid Recuperation' recovery, most of my patients are out to dinner the following evening.
The best way to assess and give true advice would be an in-person exam.  Please see a board-certified plastic surgeon that specializes in aesthetic plastic surgery. 
  
Best of luck! 
    
Dr. Schwartz 
Board Certified Plastic Surgeon 
#RealSelf100Surgeon 
#RealSelfCORESurgeon

Hi. I would recommend that you be very measured in your physical activity when returning to work. At three weeks you will still be in the recent post op period and subject to injury when performing heavy lifting. Good luck

Three weeks should be an adequate amount of time.  I would still caution you to avoid lifting more than 20-30 pounds for another 2-3 weeks after you return to work.