Were my expanders supposed to be put in while I'm still doing radiation?

This issue is very controversial.  The concept is to preserve the skin envelope during the radiation therapy then perform the definitive reconstruction afterward.  The problem is that many radiation therapists do not feel comfortable radiating the area with a tissue expander in place.  Further if the expander gets infected during your therapy then there will be an interruption of your radiation.  Not sure what you can do at this point but check with your plastic surgeon.

in certain instances, tissue expanders may be placed at the time of mastectomy for women who will be undergoing post-mastectomy radiation therapy.  Although the expanders may be removed and replaced with a woman's own tissue (abdomen-diep flap, thighs-tug flap, buttocks-sgap, back-latissimus or tap flap).