What are the health issues or side effects of vitamin d3 overdose? Instead of 0.5 ml given twice in a day total 1 ml. I’m worried

A. A supplement would never lead to any of the discomfort to the child or a person if you have taken it over by mistake and if you have taken it rapidly then it would be a problem otherwise it’s not a problem do not give it for another two days and it come with her day for the amount that you have given