Does this sound like something could be wrong with my thyroid?

I have had hypothyroidism for a while. The last year or so I have a strange feeling in my throat like something is pushing on it. Sometimes it makes me feel like I need to vomit. I also occasionally get a sore throat that doesn't last long, and sometimes I feel like my throat closes up and have trouble swallowing my pills. Every so often I feel like I'm not getting enough air and have to take big breaths. I mentioned some things to my doctor last year but she didn't seem concerned or say anything about my thyroid. She always feels my thyroid when I go there though and hasn't noticed anything wrong with it. I am worried about what might be wrong with me. I hate feeling like this. I have tried looking up my symptoms but I can't find anything that it might be. Has this happened to anybody else who can help me know what is wrong? Thank you for any help.