I definitely understand the negative spiral that can come about from simply being stuck on one word. I get stuck on words all the time, its just how it goes sometimes. You managed to find a workaround during the conversation, so there was no confusion, you still communicated what you wanted, albeit not totally aligned with what you had in your head. People forgetting words while speaking is not unusual. Try taking a bit of a pause next time you get stuck, breath in and count to ten, try and let that tension go and have another go at saying the word. Thanks for sharing x