Hypoxia and Medicine

Is it possible to experience delayed symptoms of Altitude Sickness?

Recently went on a vacation abroad, took a plane. There are feelings of lethargy and sleepiness even after 11 or so hours of sleep. Dizziness and some blurred vision, too, and a general feeling of being sick, although I haven't had any fevers or irritations. I've done some research on altitude sickness and hypoxia, and I was wondering if it was a medical possibility to have delayed or extended signs and symptoms of Altitude Sickness, or am I just tired?

Public Comments

1. Yes and it happens quite often.
2. no