For the last couple of years I have been getting very breathless when doing even a small amount of strenuous walking - e.g. walking up stairs. I just assumed that it was lack of fitness.
Then in the summer I hurt my knee and have been unable to walk more than a couple hundred yards without intense pain (I'm waiting for physio for this) so I have been avoiding all walking and most days I don't leave my flat. Now when I walk even a short distance or if I do any housework more than light dusting I get so out of breath that I feel light headed and need to sit down. On Thursday I vacuumed the sitting room and I was so breathless and exhausted after I'd finished that I was shaking and needed to lie down.
This morning getting dried and dressed after having a shower had the same effect.
Should I go and see my GP or am I just very unfit? (NB I am 57 y.o., never smoked and am slightly overweight)