Your particular experience, however, has me thinking about one of the theories regarding EVP. No one really knows where these voices are coming from or how they are recorded on our devices, but one of the theories is that they are not from ghosts or spirits at all, but arise out of our own subconscious.
Could it be that EVP come from the deep recesses of our own minds, even though they manifest in a variety of voices, from children to the elderly, and display a range of emotions, from playfulness to anger? Perhaps EVP are like our dreams. There's a school of thought that says every character in your dreams is really YOU -- an aspect of you -- and that the plot of the dream is a way of understanding something about your life or working out some problem, difficulty, situation or stress.
Maybe EVP, Julie, are like that. These voices know you. They know your family and loved ones. They offer opinions and advice. Is it because they ARE you? Maybe, in this utterly fantastic way, you are talking to yourself, giving yourself advice. As with dreams, your subconscious is talking to your conscious self through these characters, but on an electronic medium. And just like dreams, the message can often be mysterious and obscure, but definitely worth examination.
So, should you be concerned? I don't think so. Curious? Absolutely. If indeed they come from your unconscious, EVP like the ones you are capturing should be analyzed and interpreted like dreams. Perhaps you can use these EVP to understand or discover something about yourself and your current life situation. Perhaps we all can! I've never had much luck with EVP, but I think I'm now going to give it another try.