Water completely gets stuck or stops from going below the throat. Feels like there is some obstruction stopping it. For those few seconds due to obstruction n water which I have sipped builds pressure. As a result it's very painful n feels like I'm gonna die for those few seconds. Also this is happening quite frequently these days. It happens anyhow, either I sit or stand or drink with my mouth to the glass or I drink from up, in all ways. Is this due to some issue or is this normal ?