It is possible to feel uneasy when entering a room if you catch a strange vibe. The concept of "dark energy" can be difficult to define scientifically or medically, but it is something that many people experience. Spending time with a negative person can also make you feel depressed. Maybe you've been feeling a little weird for no apparent reason and are seeking a way to feel better physically, mentally, and emotionally. That's the dark energy that's enveloping you.