Negative images in negative emotions

Hi there!

So, I have this problem where when I see a random negative image in my head that has to do with me or someone else, I start to feel sad and negative. I just read in this anxiety community that thoughts can come in images so I guess what I'm experiencing is normal. The only problem is I can't control the images. I just let them pass but they always come back.

I tried to visualize good things but for some reason I can barely see the images in my mind and it's very hard to control.

if you have anything you would like to say about this situation or willing to help with this, I would gladly appreciate it.