Brief Answer:
It may be anxiety, but you need further tests.

Detailed Answer:
Hi, I had gone through your question and understand your concerns. Anxiety may be the cause of trouble talking, but other conditions, mainly neurologic ones should be assessed or excluded. Trouble talking from anxiety is more like a kind of fobia, while other neurologic causes manifest with difficulty finding or articulating words, replacement without a reason of words etc. These may have muscular or neurological causes. I suggest you to consult your primary care Doctor and discuss a better evaluation of the cause of your trouble, Additionaly you should discuss possibility of brain imaging. Cerebral MRI is a good diagnostic tool to assess neurologic conditions or exclude them. Treatment depends on a accurate clinical evaluation correlated with imaging findings.Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing

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