We actually had the same kind of night last night. The plan was to cook salmon and make a salas. My family loves salmon and we eat it a lot. However, my daughter had choir rehearsal and my son had a tennis lesson and I had to pick up my daughter's friend to take her to rehearsal also and my husband was working let. Between driving everybody to and from activities, I just didn't have time to cook salmon, even though it only takes a few minutes. So, we ate chinese food. Some days we just have to go with the flow. I ordered veggies instead of rice and that was about it. I learned that the most important thing about SP is to just move on after bad choices. You will not gain weight if you ate pizza and wings one night. If you ate that every night, then yes, it would be bad, but once in a while will not do too much damage. Sounds like you're doing pretty good other days.
It maybe too late to go back and make a new start, but it's not too late to make a new ending.
I eat to live. I don't live to eat.