Saw the doctor today and she said it was probably EIA, gave me a spacer+inhaler that I will start using before exercising. I've got my first swimming class tomorrow, though it may not be enough to provoke anything. Their new stirometry (spelling?) machine is being built, but will likely be up and running next week and I will go in for a series of tests on it (pre-jog, post-jog and post-inhaler), to see if it is indeed EIA.