Will the last couple of days ruin my diet?

I have eaten really unhealthy the past few days. About 400 - 600 of my cal came from chocolate and crisps. However I have always been around 1400 - 1600 cal total and thus under my calorie need.

I know it's not good but will it ruin my diet anyways?I'll make an effort to eat really healthy this week.

But as long as eat less calories than I need I should still be able to lose weight no matter where they come from, right?
Will the last couple of days ruin my diet?
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