I remember seeing the video of that astronaut collapsing twice, it seems like something is really wrong with her but it must be as you said, she was just readjusting to this planet.
This shows the vulnerability of our body when going through places totally different than the ones we are use to.
Cheers!
That was exactly what happened. Heidemarie Martha Stefanyshyn Piper felt embarrassed. It would have been better if NASA had allowed them to go for a medical checkup and made them go through the enviromental readjustment before the welcome ceremony. Thanks @dedicatedguy