Have your doctors diagnosed thyroid nodules?  Have they called it a thyroid goiter?  A goiter compresses the trachea and the esophagus and can cause coughing, waking up in your sleep because you feel like you can't breathe, sensations that food is stuck in your throat, etc...  for a goiter, they will first try giving you a thyroid hormone pill because the pituitary will make less TSH and the thyroid will stop growing...  if it keeps growing, then they will remove it with surgery...

it is manageable— you are going to be ok...  you are not fighting for life, because even if they have to use surgery to remove it, the whole thing is still manageable...  I understand how it may feel scary, but you are going to be ok...  remember this— the scary sensations you feel are manageable...  just keep seeing your doctors...  have you seen an endocrinologist yet?

I would guess that there is a good chance the asthma is caused by one or more allergic reactions... have you been tested for allergies by an otolaryngologist— an ENT physician?  It could be things like dust mites, mold, etc., and if you can remove the source of it, and there are lots of special ways to do that, then that may greatly reduce your asthma problems...

you are not whining about this stuff one bit...  you feel free to keep talking to us about all this...

I just wash feet for a living, but I will be glad to discuss these things with you... I think a good foot-washing would make you feel better, but that is just my humble opinion...  keep us posted...