I typed some of my symptoms in this thread came up first, so here I am.
I think I may have had slight symptoms for a few months, but only really noticed it a couple of weeks ago after flying long distance. For a few days after the flight I've had really stiff back, stemming from a specific part of spine, lower back. This stiffness wore off over a week and is almost gone. I also had a small fatty cyst in neck which I discovered a month ago, but doctor assured me this fine and normal. These things may not be related at all.
I feel physically like something is not 100% but haven't a clue what. However, I feel physically very strong, am a 27 year old, slim/medium build. Run 10k fine just two days ago, easy. Actually, I have yet to have this problem while running. I've been lacking energy the past few months, feeling wiped out, but not physically tired, I put it down to lack of exercise. Maybe this ain't related either.
So I was waiting in the airport after first part of flight and I started to feel panicky, anxious, pressure randomly building up in head, then sinking as if I was passing out. Scared me, which in turn made me feel worse. I thought maybe it was panic attack, but then thought, there's nothing to be panicked about and the airport was a lot smaller and quieter than the busy airport I was previously waiting in, didn't make sense. Also on the busy cramped plane I felt fine.
It happened again, one week ago, I was in super market feeling 100%, browsing, talking, relaxed, then out of the blue I get the same sinking feeling and instantly put my hand to forehead and head down to almost catch myself, which seems to give me instant short term relief and stop me from what it feels like fainting. I pushed myself to drive home even though partner offered and it was hard work, once home I felt like laying down, after around 1 hour I felt normal again.
So I was starting to think, maybe I was just getting anxious around lots of people or busy places. So me and partner have been to quite a few busy places the past week and talked with strangers, in busy places. This feeling has never returned, in fact, not even come close.
Then tonight when me and partner went for relaxing walk down a quiet street to an empty beach, it started to hit me again. Firstly, I thought my contact lenses may be sliding slightly, but when I realized I felt slightly off, a bit unsteady, though physically I wasn't. Followed by that unstoppable fear of impending doom which kicks in and slight build of pressure in head, hardly noticeable and more worrying than anything. No pain at all and hard to accurately described what you feel and where the problem is, all you know is your feeling 'off'. I have yet to encounter this in the morning, its usually late afternoon.