This was a lifesaver for me....it's a little apron that holds your drains post-mastectomy. Granted, I had a lot of surgeries and a lot of drains (I think at last count I had 22), so this was my buddy. For me, so much better than pinning it to your clothes, especially when in bed.
Also, axcilla pillows are a game changer - if you don't have access through a doc or can't find any on Amazon, dm me....my mom made a ton in a frenzy because she felt helpless, so I have access to some that I can send.
Oh, and there's a book called 'Silver Linings' that I loved. Gave a ton of info on one woman's journey plus medical info that's easy to digest.
Welcome to our terrible (but supportive) club.