BC survivor here. Listen to the advice of taking it easy, and letting your body tell you when it's ready for certain activities.
My path was easy by comparison to what you are going through. I just had a lumpectomy, one lymph node removal and radiation. But even that took the starch out of me for many months. Also if you are estrogen positive, you will be taking meds to reduce the chance of reoccurance; that can be hard on a young woman. All in all, may take a year or two before you really feel up to snuff, but it will happen. I am now a 5 year survivor and my oncologist has offically released me, and the whole nightmare seems like ancient history.
Get in touch with Casting for Recovery. There are three areas in California. If you get lucky, you will be selected for one of their free weekend retreats. That was wonderful and really helped get my brain in the right place- plus it was alot of fun and who doesn't enjoy being treated like a queen. http://castingforrecovery.org/wordpress/home/
Actually, any BC survivor should check out Casting for Recovery. One year or 25 years after BC it is definitely worth investigating.