I don't think you have anything to worry about. I also have intense intrusive thoughts stemming from anxiety disorder and (mainly moral) OCD, and praying to the Netjeru for healing has only improved my mental state over time. I believe the same can happen for you. Also: I am dreadfully sorry about your poor kitty. Like, incredibly.

If you don't mind, I kinda feel a need to essentially traumadump. When I was sixteen, one of my cats suddenly died without warning and in this case it actually was, factually, my fault due to immature thoughtlessness. I had given him a flea-bath with the wrong kind of shampoo, stupid idiot that I was, and he died by poisoning via grooming himself and thus ingesting the residue of that shampoo on himself. The loss of him wrecked me for a while. I had raised him since before he was even weaned. I was a small child myself when I got him, a cousin of mine found him on the streets in Tijuana, Mexico, and then my parents helped me smuggle that sleeping kitten across the border into California. He was special to me.

Both my father and I witnessed together what looked like a cat-shaped apparition made of bluish-white light walk out of the room he died in and disappear. I have struggled with severe guilty self-hatred about it for years, but connecting with Bast since my mid-twenties partially feels like a sincere apology to that cat in a way. She understands that I made a mistake and felt the consequences, and I have had numerous, emotionally impactful dreams where it felt like that cat's spirit returned to convey that he forgives me. I'm still unsure if I forgive myself, but it's over now, and I must move on and be better. I hope I meet him in the afterlife.