I am so sorry that you are facing all this. It is such a difficult thing to wait when all we want is for the cancer to be gone and life to return to normal.
But time is on your side. DCIS is not invasive cancer so as much as you want it gone right now a few weeks will not make a difference in the long run. It is so important that you make the choice which will give you the most peace of mind down the track.
My diagnosis was in May last year. I had 3cm invasive ductal carcinoma as well as 3cm high grade DCIS. It can be difficult to make a decision before surgery as until they examine the cancer after it is removed you don't really know the whole picture. There are lots of things to consider, many of these very personal to you. Some people have a lumpectomy or single mastectomy and then gather as much info as they can before deciding on any further surgery. You could be tested for the BRAC genes and this could help you with your decision.
Don't feel that you have to make all your decisions before your surgery on the 25th. You can always decide to remove your other breast later in conjunction with reconstruction. Take your time and find out as much as you can before you decide what is best for you.
Wishing you all the best for whatever you decide. Take care. Deanne xxx