You are likely freaking out over nothing. If you are concerned, it's always best to have a dermatologist look at it, but what you described does not sound like melanoma at all. For one, it's very small compared to most moles that turn out to be cancerous.
The "ABCDE" system is very helpful in identifying potential skin cancers: https://www.cancer.org/latest-news/how-to-spot-skin-cancer.html