Why do I have difficulty taking deep breaths after Breast Augmentation?

I had breast augmentation 9 days ago, and since about day 3 I have been feeling as if I can't breathe deeply when standing up and especially when laying down. I feel kind of lethargic and have a dull headache when I wake up in the morning. My PS has listened to my lungs and everything sounds fine according to her. I had tuberous breast correction and 295cc silicone implants put in, she also had to create a breast fold for me by attatching some of the breast tissue to the top of my abs. Any help?