Can I get a boob job while breastfeeding?

You should wait 3-6 months after you stop breastfeeding before considering breast augmentation.  This allows time for the breasts to return to a stable state.  It will allow you and surgeon to better determine appropriate implant size and style and also see if a lift is recommended.

Hello and thank you for your question.  The
best advice you can receive is from an in-person consultation.  I recommend waiting until you are finished breastfeeding for six months prior to having a breast augmentation.   Make sure you specifically look
at before and after pictures of real patients who have had this surgery
performed by your surgeon and evaluate their results.   The most
important aspect is to find a surgeon you are comfortable with. I recommend
that you seek consultation with a qualified board-certified plastic surgeon who
can evaluate you in person.
Best wishes and good luck.
Richard G. Reish, M.D.  FACS
Harvard-trained plastic surgeon