Does this descibe what you are feeling?
A language dysfunction characterized by the inability to name people and objects that are correctly perceived. The individual is able to describe the object in question, but cannot provide the name. This condition is associated with lesions of the dominant hemisphere involving the language areas, in particular the TEMPORAL LOBE. (From Adams et al., Principles of Neurology, 6th ed, p484)
If it happening a lot you might want to get an MRI done.
CN say, never do any test unless you know what you want to do with the results and this is a classic example. Trust me, whatever the medical profession is going to do with the results you don't want to go there. MRIs are assumed to be benign tests - yet another screwed up assumption. At the end of all the stupid tests you will be told it has an unknown etiology that is idiopathic. Translation, they don't have a fkcn clue what caused it or how to fix it.