Normally the swelling from a breast augmentation increases for the first 4-5 days and usually peaks about day 5. Since that is about where you are, you are the point of peak swelling and greatest tightness. The breast tissues were put on stretch to cover the implants and that stretch has been worsened by the swelling. Consequently, they will feel tight and hard.It will take about 6-8 weeks for 80% of that swelling to resolve, although after about a month they'll start to look much better. The last 20% may take a few months more. Complete softening may take 4-6 months for all of the tissues to stretch and relax around the implants.Occasionally, there will be some bruising after a breast augmentation. This is usually minor and resolves in a week.