My Cat Is Acting Strange

I've had my cat since he was a kitten (around 15 years). He's always been a little strange, but he has never acted like this. He was born without front teeth (he had canines, but nothing else), his tongue would always stick out, and he was more likely to act like a dog then a cat.

A few weeks ago however, he started to act strange. I was laying in bed at around 3:30AM, my cat was laying on the floor in the middle of my room just on the edge of being asleep. All of a sudden, my cat jumped to his feet, staring at my door. He stood for several minutes, his ears twitching every which way. Then all of sudden, he whipped around and started "chasing" something around the room. He even jumped up onto my bed and ran from the head to the foot, before jumping back down. Then just as quickly as it started, he went back to his spot in the middle of the room and laid down. He did this for almost a week straight, then he didn't come into my room at all.

I walked downstairs and found him laying on the couch staring at other cat as he laid on the dining room floor seemingly asleep. I came back down the next morning, to find that the cat that was laying in the dining room had passed away in the night. What freaks me out the most, is that my house is over 120 years old, and in an area known for hauntings. My cat stopped "freaking out" after my other cat passed away. But just last night, he started doing it again.

I have a few videos, unfortunately, I don't have a video of the first night. The one where he was running all over the room, like he was chasing something. As you all known, I've had other experiences in my home. However, my cat has never really reacted or been involved in any of them. Until now.

Just last night, as I was calling him into my room, he spun around, stared at the corner of the ceiling, and cowered against the wall. It actually took me several minutes to get him to come away into my room. As I picked him up, I got a really bad feeling. The moment I set my cat down in his place on my bed, he jumped down, and sat staring at my door.

There have also been instances where my cat will act as if he smells something. He'll walk around my room like he's following some sort of a smell.

It's important to note that when I get up to use the bathroom I always find myself checking up and down the hallway. Feeling as though I was about to get hit with something. My eyes have always been drawn to the corner my cat was staring at, and the nearby attic door. I am honestly beginning to think that I might invest in some night vision cameras and post them around my house at night. I'm not sure if this is a good idea. I don't want to make things worse then they already are.

I've also thought of taking a day, and go around to the "hotspots" on my property, and recording some videos, just to see what I catch. If I catch anything at all.