Some experience some back pain during recovery. Some doctors will have you wear a band above the implants to help push them down. You can also roll-up a sports bra to act as a band. See the TUBA page . Check forum discussion here .
Most docs suggest wearing only a sports bra after surgery.
Most suggest not wearing an underwire for six weeks after. Also, you may find certain bras uncomfortable for a long time. According to La Leche League one can breast feed after a BA with silicone or saline implants. See forum discussions Breastfeeding with implants and more Breastfeeding with implants. Check with your surgeon and get several opinions.