Its a really annoying problem that i always get

You may be interested in Daniel Wegner's study on the "ironic process," also known as "don't think about white polar bears." What you're noticing here is that the more you try NOT to think about something, the more often those exact thoughts will arise. This falls in line with the Ironic Process. I think what people mean when they say to "not go there," is that you don't want to hold onto the thoughts. You can think a thought, notice that it's there, and then let it go. That's not the same as actively trying to avoid the thought, which results in the thoughts coming back harder. Perhaps some imagery would be helpful. Imagine your train of thoughts as a literal freight train. You're sitting on a patch of grass next to the train tracks as the train passes by. Latching onto a thought is like jumping onto the train and riding with it. When this happens, you're taken out of the present moment (the patch of grass) and become lost in a fantasy world. The goal here is to simply watch the train go by. You aren't ignoring it or pretending it isn't there, you just watch the cars as they pass. Thoughts don't need to be analyzed. They aren't really trying to "tell you something." What IS trying to tell you something are you feelings and emotions. Those are what you want to focus your attention on. Thoughts are just the brain's attempts at making sense of the world and your feelings.

Two things come to mind . The brain gets bored easily and it thinks it helping by giving something to dwell on . What I do is try to engage with the unwanted thoughts in as much an indifferent way as possible recognizing they are there and going about my business.

Plus i forgot, if i dont have the sudden anxious feeling then i start to think about the thought. I noticed it right now that a thought didnt made me anxious as it used to so i started think about it more like im interested in it... its like automatically i think about these things