Originally Posted by
Machka
A) Go to your Dr.
B) Slow down when you climb. But go to your Dr first.
I would tend to agree.
As others have mentioned, it could be that you have not progressed because the distance is relatively short and you keep hitting the same “wall”
But it could be a medical issue. Not sure if you have already had a physical recently but Doc can at least run blood work and recommend tests from there.
You could feel more confident pushing yourself if you knew that it wasn’t dangerous to do so.