Difficulty taking a deep breath can be caused by low thyroid

http://www.pps.org.pk/PJP/8-2/Roopam.pdf

If you have a strange breathing problem no one can figure out, the problem could be a weak diaphragm caused by low thyroid hormone.

Have you had your thyroid checked? Most doctors use TSH to diagnose thyroid problems, but the thinking on using TSH for diagnostics is being questioned now: https://www.nahypothyroidism.org/how-accurate-is-tsh-testing/ Many doctors now do a full panel (T4 and T3).

Many things in your diet can affect the thyroid. Be careful of consuming too much of these: raw cruciferous vegetables (broccoli, cauliflower), soy products, and green or black tea. And make sure you are getting iodine somewhere in your diet (seafood, or supplement).

Now you have an excuse not to eat your broccoli. :)

I keep telling all the docs that I think I have a low thyroid problem but they will not listen. I only got the TSH results. Also showed some abnormality on thyroid but they said it was not important, just ropy.

They only give you two minutes anyway and then on to the next.