I had a scope down the throat which the doctors decided to do - and the buggers just went straight up behind behind my sinuses and came back into the throat after the scope!
Anything that goes hunting for them with a bright light will make them move fast.... Doctors thought I was a joke... but I felt the migration after the scope and it was such a nightmare.
I've recently been doing prazi and it seems to be helping after I sneezed up a live fluke onto the carpet - and now I have a positive ID on what's been ailing me.. and I think Ascaris might have come up with the migration too... but the flukes are the most unsettling...
Seriously, there is noone to speak with apart from people on this forum! Thanks for listening!