anyone ever gets morbid intrusive thoughts?

So in the past couple months I've been getting those recurring disturbing intrusive thoughts, or more like images. They are always distressing or morbid and just pop into my mind out of nowhere.

The ones I get the most involve my dog getting getting hurt or dying, like someone abusing him, him getting hit by a car or attacked by another animal, but most of the time he is drowning. Like I will be doing something completely unrelated to him at a random time of the day, and all of a sudden I will get this mental image of my helpless little dog that I love more than anything, drifting away in water, struggling to stay afloat.

It FUCKS ME UP to no end, I have no idea why this is a thing that keeps randomly happening . I take really good care of my dog, he is my baby. Every time those morbid images pop into my head I end up having to hold back tears because I can't stomach the idea of anything happening to him.

I will also get random instrusive thoughts/images of people I love being hurt, of my husband fucking someone else, or myself physically assaulting people (although those happen way less often. 80% of the time it's my dog dying).

Has anyone ever experienced anything similar? It keeps happening more and more often and it really fucks with my head. In the past I have been diagnosed with severe depression and anxiety disorder and never followed through with any sort of treatment besides going to therapy for 3 months last year. Also i have a pretty bad substance abuse problem which I'm sure doesn't help. This shit freaks me out like it makes me feel like I'm close to losing my mind. Please tell me this is not an uncommon thing 😢