Why do I keep waking up with an intense fear that someone is in my bedroom?

I’ve had this happen multiple times now and I’m really not sure what’s going on or why it’s happening. I’m a heavy sleeper so I’ve checked my room multiple times to see if I’ve just been having a weird dream, but every time I’ve been alone.<br><br>This happened once or twice in high school, but now it’s happening at least once a month, and I’m an adult living alone now. I’ve also started noticing that when this happens, my room is usually in darkness except for a glow from the bathroom. It’s weird.<br><br>Is this normal or should I be concerned? I’m not experiencing any nightmares or anything. I’m not really sure what’s going on with me.