dramatic differences in body very quickly??

So, just the past week hasn't been too amazing for me, I only got to the gym twice to lift (I like to do 3 times a week) and was working a lot and really tired and at the beginning of the week it was before/during my period so I was having really strong cravings for sweets and I tried to control them best i could but I still ended up being over calorie a bit most days I think (however, I don't log calories burned while at work (and I'm on my feet the whole time) or for lifting cause you can't calculate that very accurately) and then this weekend was a family reuion with a big cook out one night and then a baseball game in a private box (aka endless available food) and then dinner at ruth's chris steak house. I tried to be the best I could, stayed away from cakes and cookies and breads and hot dogs at the game and stuck to veggies, salad, and popcorn mostly, but I did have 1/2 a caramel apple too. And then for dinner I logged the steak I had but the appetizer and dessert I had planned on wasn't available so I had a salad (dressing on the side) and then berries and cream (which ended up having TONS of calories in it but it was probably the best choice of those available) ANYWAYS: MAIN POINT: in just this week of being "bad" and not even terrible my body seems to have changed so much like in my workouts I can still do the same weights, but like my stomach seems a lot softer and like those old creases are starting to show right below my ribs, and then my back creases are a tiny bit back as well and just like...how did this happen so fast, I've been on the straight and narrow before this and all my clothes fit fine and I had been feeling great...now I feel like ****