There is no need to worry at all. Just relax and be confident at all times. But at the same time, also be wise and practical.
You should not think, “Oh! I have abundance of Grace in my life”, and then put your hand in a burning fire. If you do so then naturally your hands will get burnt.
Being confident (of Grace) does not in any way mean losing awareness and being
impractical. Also, feeling secure and confident should not make you passive and lethargic in life such that you end up doing nothing.
You should not become irresponsible. Do your job sincerely and attend to all your duties and responsibilities wholeheartedly. Leave the rest to God with faith.