So I have been battling the flu all this week, starting to better. I have been coughing a lot so I guess there's a lot of mucus left behind. Well last night I started to get this feeling that there was an air bubble stuck at the very bottom of my throat. Almost like if a pill got stuck there. I kept trying to drink water and it would go down, but it would like gurgle and bubble down. I became more anxious and began feeling like I was choking and it would never go away. This was at 6 am so the worst time for anything to happen. I can decided if it was an air bubble or post nasal drip. The only thing that would help was breathing deep to "burp" but it wasn't a burp it was like a little bubble. Then it would gurgle all the way down to my chest and get trapped again. What is this? I'm so concerned it's going to happen again. It was extremely uncomfortable and it made me have a panic attack. Please help