Not sure who to ask...

....but I figured this may be a good place to start. I've noticed
recently that during take-off I feel such an immense pressure against
my head and chest area that I literally can't even see straight. (its a

very strange feeling of helplessness that lasts maybe 10 seconds after
take off) I know it sounds crazy, but thats really the only way I can
describe.

I can assure you its not anxiety as I have flown literally hundreds of
times from big planes to small and have been all over the world. So
flying does not worry me. I also noticed that this symptom doesn't
occurr at all if I sit behind the wings so Im thinking it must have to
do with some sort of pressure issue.

My question is, why, after 25 years, did this pressure issue become an
issue now? Why is it better if I sit behind the wings? What is it?
Is it a dangerous issue? Why do I seem to be the only one with this
problem (I look around the cabin after I regain compsure and no one
looks like they were feeling the same effects)...