First off I just want to say I am glad your ok!

You are certailly right about not ignoring the signs.
Last Dec. I lost a good friend who just happened to be my brother in law as well. (Also an electrician) His leg had been bothing him quite a bit. He did see a Doc but was told he most likely strained himself at work.
A couple of weeks later he was gone due to a clot.

Apparently if an ultrasound had been done on his leg there is a good chance he would still be around today.