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I just read a book on this and it said that people without OCD think a thought and that’s that never to be brought us again however people who suffer form intrusive thoughts continue to dwell on the meaning of that thought then end of obsessing over it.

You can tell that by the feeling of urgency - you have to fix something immediately, you have to know by NOW and so on. Read Needing to know for sure (Winston and Seif) where there is very good explanations of intrusive thoughts and their checkmarks.

I appreciate this question!! I can’t stop with my intrusive thoughts and at times it’s unclear why i’m having them so much!

I think most thoughts are intrusive, people who don’t suffer from OCD get intrusive thoughts. I think a good way to think about it is, if you look at a tree and think “I wonder how old that is” that’s just a thought. If you’re sitting doing homework and you start thinking, “The universe is so big” that’s an intrusive thought. If the thought has nothing to do with your present moment, I would consider it intrusive.

I think you can tell easily but obviously long enough it will start feel like it’s you who’s having these thoughts but that’s still ocd disguising as your own voice or thoughts. It’s a tough disorder forsure.