Dont worry, its all natural. From what Ive been taught, orbs are just amounts of discarded lone energy. When people do rituals, think hard enough, or even just live, we give off and collect energy. Most energies that break away from us usually cluster together and form orbs. Most are less concious thank we are. Other are concious enough that we can equally refere to them as spirits, or can be a spirit just taking a simpler form. But either way, as long as they anit trying to bother you, just dont pay attention to them cause they arent normally much of a nucince.