YES! I definitely can be thyroid related! Prior to being diagnosed myself, for a few years I noticed, or, my husband noticed, that I got out of breath quite easily. Like it was happening after ONLY going up 4 steps (back door) I was extremely HEAVY at the time...but this was a "new" symptom (at that time) for me.
Plus, I was noticing when I laid down to go to sleep at night, I'd have periods of wheezing when I exhaled....and it got to be a pattern, when I started hearing that sound, I KNEW a "cold" was lurking in me. And sure enough, no matter what I'd TRY to do, it would ATTACK...and it would be HORRIBLE. It would start in my sineses and eventually go into my lungs! I'd cough SO HARD it would pull muscles. It would LAST forever too! (weeks) AND because I wasn't thinking straight, I'd be bullheaded and NOT go to the Dr. Basically, because one time I had, and the STUPID DR. didn't GIVE ME ANYTHING because he said "Well, I'm not going to give you any antibotics, because this is the problem, people are just resistent to antibotics these days, you'll just have to let it wear out of you." And...he gave ME nothing! I WAS SOOOOOO TICKED OFF...here I was, sick and going to the Dr. FOR NOTHING! ~ I believe IF he would have been a better Dr. he would have SEEN all of these signs in me.
So, for a couple of years, this same cold would "hit" during the fall and winter months....and every year it would do the same thing.....wheezing, sinuse drainage, coughing, enlarged lymph nodes, hurting back to my ears, and eventually respiratory problems in my lungs. BUT, I didn't GO back to the Dr. because I reasoned "why?" they won't GIVE ME ANYTHING!
Why bother? BUT...EVER SINCE taking my synthroid, It doesn't do that, I don't get SICK like that. However, when I was on generic thyroid (for 3 months), those symptoms started to happen...the FIRST SIGN OF WHEEZING when I lay down and I KNOW something wants to get started. I switched back to synthroid, and sure enough, it's cleared up.
This happens when it's colder, I don't know if it's the COLD or the allergies from pollen, or mold or what...but it's something. We have weaker immunity...so it strikes us, especially those who haven't been diagnosed with thyroidism.
One time, when I was first diagnosed with thyroid, I was taking my medication, but, for whatever lame brainness I have, I had decided that "no, I don't NEED THIS medication, I'm not someone who's got any problems" (I'm not very BRIGHT sometimes! lol) and for a week, I had gone off it. I sell crafts on weekends during the fall and Christmas..and we do outdoor shows....and I live in OHIO, and during the fall, it can get REALLLLLLLLYYY COLD in the fall when you have to "set up" in the dark (early mornings) and it's damp. Well, at the end of that week, during the show I got REAAAALLLY SICK, and it was DUE to me thinking I didn't NEED that medication! WRONG!!!!!!!!!!!!!!!
My point is...after this long post...lol....is YES, it's connected. and IF your still feeling it, more then likely your STILL undermedicated. You Dr. maybe just to "conservative" and/or my wish to frieghten you, or tell you YOU SHOULD TRUST THEM, but, be VERY WARY! Because many of them simple don't KNOW anything MORE then what they've been force feed by their education and FOR PROFIT PRESCRIPTION COMPANY'S!!!!! ~ Synthroid MAY help many/most of us with this condition, but it's a very good chance that it's not addressing ALL of these issues, and alot of these issues can be addressed...but only ASTUTE Dr.'s have ANY CLUE!
May I suggest Mary Shomon's book Living Well with Hypothyroidism. It's an AWESOME BOOK...and it's a GREAT learning tool for someone NEW to this! Learn all that you can, because so many of us are in your same shoes!
Sorry for the length.