I went out with a friend one week post surgery. It was a chill outing (coffee, dinner) but when I got home I felt more pain than before I went out. My right breast was very tight as well and I could feel it swollen. I worried I did something to mess it up especially since I carried a few heavy things that day. But when I went for my checkup, my doctor said this was completely normal because I did use my arms, which put some pressure on my breast. She said this tightness feeling should come and go during my recovery especially if you use your arms a lot and carry slightly heavy things. A few days later the tightness went away and I feel so much better now!