Congrats on getting through the procedure -- that's wonderful! When will you get the results? I had the wire thing too though, as I told you, I didn't have dense breasts. I'm sorry for the anxiety you both have to go through. I found a really good book for my husband when I was diagnosed with breast cancer -- it's actually called "Breast Cancer Husband" and there is a website by that same name. My guy found it very helpful.
As far as the gym goes, I would wait the full two weeks, if that's what they recommended. Maybe you can do some walking outside or something similar where you can clear your head.
I have a suggestion for a book for you, too. Look on my profile page and under the "about me" portion is the name. I'd put it here, but I don't remember the specific name!