Hi Monica,
Only you can answer that question. I was diagnosed with DCIS in October 2012, I had to have a single mastectomy I chose a bi lateral mastectomy. I didn't need chemo or rad so I was able to reconstruct straight away. Tissue expanders were put in i call these my fake fake boobs and then in April the real fake ones will go in.
Pain wise, for me the first 48hrs were the worst but don't be shy to ask for the strong stuff to get through it. I took a morphine tablet every morning and night for the first 5 days and panadol in between. This helped me to rest properly which in turn helped me to heal.
I don't regret one minute my decision to take both boobs off as it has given me (for the most part) peace of mind. Both my mum and sister were diagnosed 12 months before me and it was because of them I went for a mammogram, which thankfully picked it up early, when I had the surgery they also found a 17mm invasive tumor that the scan didn't show, so this made me greatful that I had decided to do both.
Recovery post op was easier than I thought, I'm a beauty therapist so my job is quite physical but I was back 6 weeks later. I am now 9 weeks post op and feel great.
I wish you the best for the surgery, it will go well and you will be fine. Xx