A particular came to my mind after a work related meeting, and it has been consistently occurring to me since then. I want to say "This thought has been -----------ing since last 2 days"
I thought about using the word: "Pestering", but its meaning "trouble or annoy (someone) with frequent or persistent requests or interruptions." seems to have a negative connotation.
A negative connotation is not what I am experiencing. It was repeatedly occurring in a positive sense really. How do I express this?