Desperately in need of an answer😥

Hi,

I'm a newbie here hopefully someone will be able to give me some insight.

I've been on thyroid meds for a few years. Here's my situation I've been dealing with....
When I go for a walk in the morning with my hubs I *used to be able to keep up with him* NO problems.
But now when I try I feel like I get SO hot that I'll pass out and I mean that literally. It's only when I'm walking or if there is a temperature increase all of a sudden. I just had meds checked and the doc increased a smidge.
This has been going on for a few years. Doctor can't seem to figure it out. Any clues?
I get SO frustrated because I should be able to walk and not a snails pace!!! It's ridiculous I can't even keep up in a grocery store or Wal-Mart.
I've had stress tests (done in the coldest room ever) came back nothing. Lots of other tests all came back nothing.

Any thoughts? Anyone think it's a thyroid problem? 😊
THANK YOU😊

Hi,
Sept 6.87
Dec 2.25
Feb .15
Mar 8.71
May 5.0
Jun 5.27
That's the other thing Doc has no clue why I can't get the numbers under control. I've been on medication for around 3 or 4 years and it's always been under control.
With that being said I have ALWAYS had this problem since I was diagnosed. SO I have no clue!
AND finally the doctor is going to do Free T-3 Free T-4
Ugh....

I take Levothyroxine first thing the morning with a glass of water on empty Stomach and then I wait at least an hour (usually it's like 3 -4 hours) to eat.
Euthyrox (would that be the brand? I have no idea if it's generic?)
And
nope no thyroid ultra sound yet. I think the doctor plans on doing that next.
Thanks for replying😊

I've never been tested for Hashimotos?
Anyway this is fun.
THANK YOU for all of your advice😊

Thank you will do!