Is Swelling and Tightness After Breast Augmentation Normal?

I had breast implants put in 7 days ago. My breasts have become more swollen over the last three days and feel very hard; no pain, just tightness, aching/tingling. Is it normal to have these symptoms several days after the procedure? Most of the swelling is in the upper chest, above the nipple. My implants are under the muscle, 250cc Silicone gel.