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Yes, you should go to the ER if you feel like something is stuck in your throat.
If you are vomiting, and unable to either expell anything or drink anything, this could be dangerous. Even if it is not all the way shut (your esophagus) you should take this as a warning and go to ER so that x-ray or other study can be done to see what is happening with your throat.
If possible have some one drive you.
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