Sometimes i subconsciously ask for bad things in my Dua'a that i don't want. Because i know that i'm not supposed to ask it, it just happens. e.g. i will make a Dua'a that my children will be happy and healthy and will outlive me. But then subconsciously i will think i hope they don't even though it's not what i want to happen. It just repeats in my head because i know i shouldn't think it. So does Allah accept Dua's we do not mean?
Allah knows your intentions, and understands you very well, that what is in your heart. Dua is not like if you utter wrong words by your mouth then those wrong words will become true. So what you have in your heart, and your intentions, ONLY That will be accepted by Allah, and what you Actually mean to ask in dua, and not what you utter by mistake.
And Allah knows the best