You may have or have had a glob of the protein powder stuck in your throat/nasopharynx and it is interfering with your vagus nerve and therefore your nervous system. This actually happened to me recently with some kratom powder (which I only take occasionally btw).
If this is still bugging you, I would try some combination of a neti pot, gargling water, and/or some straight strong liquor.
If this is still bugging you, I would try some combination of a neti pot, gargling water, and/or some straight strong liquor.