Oh how awful for you. The good thing with dcis is sometimes the surgery is the only treatment. Your surgeon will tell you more about what's next. I presume you are seeing him quite often presently. Ask your breast care nurse about treatment delays etc as she'll have more knowledge and they work closely with the surgeons.
Meanwhile...things to help....really good diet with lots of fruit and veggies. A good multivitamin won't hurt and if you smoke see if you can cut down as much as possible even if this means patches, inhalers etc.
Sending you positive thoughts for speedy healing.