Are you able to talk to your doctor about some ways that you can over come it? If you you experiencing it this much, I would reach out to your doctor for some tips.
You need a 24 hour BP test. Go to your Doc and get him to organise one for you. Its non invasive, a little annoying but costs little.
I've got no help to offer, but I can say I feel ya. I have terrible WCS as well. I can't take mine at home and get a normal reading either. It is the most bizarre syndrome I can imagine. Makes things so difficult at times. People who have never experienced it just don't get it. You cannot make them understand how it makes you feel, why it even happens.
My wife. My sweet dear wife can take my blood pressure and I am completely relaxed. Well, the second reading always drops a few points. She is the only person I know that can take my blood pressure and even get close to a true measurement. I Hate this crazy affliction.