what happens if i don't ask for forgiveness for unintentional things and can i do it later?

Answer 1

When you give your heart to Jesus, and ask Him to control your life, your sins are forgiven. At that point in your life, there is nothing you can do or say that will erase the fact that your sins are forgiven, past, present and future.

When I sin, and most of the time I say things I should not, I immediately ask God for forgiveness, although it was forgiven before I asked. I tell God I am sorry I said, or did that particular thing. The price for those sins was paid, prior to my asking for forgiveness.

Answer 2

you must ask Jesus into your life and then you will know you are living for him.