Yup, I know what you mean.
I hate wasting food and often save leftovers to make someting else
as it was hot hot - personally i'd cook it.
When you cook it you take it to such a high temp as to kill off the bacteria, that have started breeding, whereas if you leave it over night they could make you sick.
When you defrost anything and aren't going to cook it you need to keep the temp below 5-6c, if you do cook it then it isn't such a problem.
That's what I learned as a chef.
I mean it's up to you, but for me personally - i'd cook it now to be safe.