That feeling of not being able to stop thinking about it is honestly one of the most telling signs something genuinely weird happened. Your brain keeps chewing on it because it cant file it away neatly.
What colour was the light? That detail tends to separate the mundane stuff from the actually strange. Drones and planes have predictable light patterns, warm whites and reds. The cases that get me are the ones where people describe this cold blue-white or amber glow with no blinking rhythm at all.
I live near the bayou so I've seen some odd things over the treeline myself. Swamp gas and all that is real but it doesnt hover with any kind of intention, and you can usually tell the difference in your gut.
Post whatever details you remember before they get fuzzy. Sound, movement, how long it stayed, whether animals went quiet. The full picture matters more than people realise when you're trying to figure out what you actually saw.