Should I be concerned?

New to the paranormal community and still pretty uneasy, so please bear with me. This morning just before 3am, I woke up (which is a regular occurrence for me). I looked up at the doorway of my room and saw the silhouette of my boyfriend peeking into the room. This isn’t out of the ordinary, as he is usually up at this time and he sometimes checks in on me if he hears me wake up or hears any noises coming from my room (I tend to talk in my sleep fairly often). I said “Hi, honey” so he would know I’m awake. He didn’t respond, and seemed to walk away to his room where he usually watches tv. I assumed that maybe he had his headphones in and didn’t hear me. I spoke a little louder and asked, “Hun?”. I heard him responding from his room, saying “babe?”. (For some context, he keeps his door shut to keep the noise and light down and locks the door because one of my cats knows how to open it.) I immediately jumped out of bed to ask if he had just been in the hallway. He said that he hadn’t been, and immediately starts searching every room in the house and making sure that there are no doors or windows unlocked, but we thankfully didn’t find anyone and everything was locked. I tried researching a bit today and couldn’t quite figure out whether or not this is something I should be concerned about. Does anyone have any ideas as to what this may have been?