Please do make a big deal out of it. This is serious. There are both medical and mental illnesses that can create this type of experience. The problem with waiting to seek help is that the condition could get worse.
Please first see your physician and share your letter. The problem may be as simple as a vitamin deficiency.
If your doctor determines that you are physically healthy, then see a mental health counselor or psychiatrist for an evaluation.
Currently you seem to be able to resist the demands of the “voices” but, without treatment, they may become more difficult to resist. This could have terrible consequences, especially if the demands are against the law.
I’m very glad you wrote. I appreciate that you don’t want to over-react but I do think it’s time for you to take the steps necessary to understand your situation and to explore treatment options.
I wish you well.