I think I would also have a hard time with that -- I don't usually have verbal thoughts. Given KK's post, I wonder if it's related to "alexithymia":
https://en.wikipedia.org/wiki/Alexithymia wrote:
Alexithymia /ˌeɪlɛksəˈθaɪmiə/ is a personality construct characterized by the sub-clinical inability to identify and describe emotions in the self.[1] The core characteristics of alexithymia are marked dysfunction in emotional awareness, social attachment, and interpersonal relating.[2] Furthermore, individuals suffering from alexithymia also have difficulty in distinguishing and appreciating the emotions of others, which is thought to lead to unempathic and ineffective emotional responding.[2] Alexithymia is prevalent in approximately 10% of the general population and is known to be comorbid with a number of psychiatric conditions.[3]
It seems like that could affect even non-verbal thoughts about emotions. Heck, I even seem to have a hard time realizing when I'm hungry, thirsty or even in physical pain.