I love with my parents and a sibling in our house that my great grandfather bought. Ever since we were born, my mom has felt an evil presence and feels like something wanted to attack her. Me and my sister did not believe much in it because we never new a world without these things. It felt normal to us. Having a sensitive nervous system, always being on edge became our normal. But as we grew up, my sister and I moved out for college and work leaving our parents and our dog at the house. 

Now, my dog was going to turn 12 soon but he died a few days ago very unpredictable. Though he was old, he wasn't having any issues before this. He got super sick, stopped eating and when his treatment got started, he got even more weak. He died painfully, he started having seizures at night and he went through 13-14 seizures throughout the night and he kept fighting through until he gave in finally at morning 7 am. 

When all of this was happening, we felt a sudden shift in the weather and a weird presence. My sister and I heard low growling sounds. I personally felt like there was something cold and weird mocking me. 

If it was just death coming to take him away, I wouldn't have felt so bad. There would be some sort of acceptance in me but it felt evil, like it was challenging me, mocking me. 

I know I'm dealing with a lot of pain, and loss of a loved one. But there are things that make me believe something is off. Like someone is trying to attack us. 

Amongst other weird incidents, a random symbol I saw was a reversed cross on our staircase. It was formed naturally by water flowing and dried. But it is really strange, it's right next to our puja temple. 

If anybody has any insights on this, I would love to find out. I'm just trying to deal with the sadness and loss of my dog that protected and loved me forever and so did I. 

Need help understanding what's going on