Hi, I had an op to remove a 5cm lump from my neck and chest (and half my thyroid) around 3.5 weeks ago. The lump was pushing into my windpipe and bent it quite out of shape which was why they removed it. The last week or so I've been experiencing sudden breathing difficulties - once I woke up at night and was coughing and struggling to get air in and I was making a strange noise trying to suck air in. The second time I was eating and the same thing happened, and the third time I was about to drink a fizzy drink, breathed in some of the fizzy vapour and it felt like my throat closed up and I was making the weird noise again trying to suck air in. If I force myself to relax and slow my breathing down it subsides but this one took a while and my vision started clouding a bit. I'm worried about going to the doctor in case they just say it's a panic attack. Which it might be I guess, though I was asleep when the first one happened. I've been given no info at all about what to expect from side effects so no idea if this is normal but it's starting to scare me a bit.