It is loop-thinking and that is exactly how drug induced psychosis starts. I smoked everyday for years and each time I got high, I started to get these...just say I have an issue with paying off my car, the thoughts would be like " I just have to save my money next week, then pay it off. Just work and pay it off, thats all I have to do. If I can't pay it off, i'll save the week after and everything will be sweet" over and over and over again. Something really interesting can stop it, but that is about it.
This is loop thinking, and cannabis was the sole reason I started doing it. It only happened while I was high, then slowly I would do it while sober. I still got high everyday, then slowly came the quick whispers whilst high, the eventually started to present themselves very subtly whilst I was sober.....and all hell broke lose.
Enjoy smoking this "soft" drug. It is not as safe as some stoners make it out to be.