binging on period

i gave into my cravings today and stuffed myself. ive been so good this month and have lost weight but my time of the month is the worst. last saturday i went to pizza express and had doughballs, a thin large pepperoni pizza and a bit of ice cream and a hot chocolate. i worked hard this week at the gym and have watched what i eat. however today ive just stuffed my face. here's what ive had:

dairy milk= 100g or 20 small square (552 kcals)
2 neopolitan ice cream wafers= (135 kcals each)
2 small packets of mccoys= (158 kcals each)
pizza express pizza from tesco= (600 kcals)
2 mints= (50 kcals)
low fat popcorn= (94 kcals)

later i had skinny cow low fat mint ice cream (128 kcals) and some tortilla chips (350 kcals)


i know that's pretty awful and i've had around 3,500 kcals today. i feel really greedy and gross. will this affect my weight loss a lot? I go to the gym 4 times a week and walk to and from work every day (it's a 40-45 minute walk each way). I've at least burnt 300 kcals from walking today. I watch what I eat and I eat plenty of fruit and veg. I don't want to eat anything else now as I feel I've satisfied my cravings.