Struggling with smaller portions

I ate way too much during the course of a day.  I ate more than 3100 calories even though I have now  a 2200 calorie limit.  Maybe I should lower it to 2000 calories.  Less calories consumed and more calories burned means faster weight loss.  I just have issues with eating smaller portions.  I ate way too much early in the day.  I also ate too much during lunch as well.  Other than that, I don't feel guilty.