Is it normal for my breasts to feel "tight" in the morning only?

This is very normal. In the weeks and sometimes months after surgery, the breasts will remain swollen. During the day, the swelling goes down when the fluid drains from the chest. When you sleep, the fluid redistributes back to the chest, making the breast feel tight. This will improve over time.

Hi Kgar, I completely agree with Dr. Blinski here in that it's always best to follow up directly with your plastic surgeon with all your post operative concerns.  In general however it is not uncommon to feel tightness or pain in the breast area just eight days after your breast augementation procedure.  Very best to you. -Brian Coan, MD, FACS