I am no sky diver, but I recently read a serious article that explains that it is common for folks to be exhausted after a dive, just from the hormone dump associated with the jump. The diving instructor is even quoted as saying that some guys land yawning loudly.
What that says about an individual's health as it relates to hormone levels, I cannot say. Just wanted you to know that what you experienced seems to be decently commonplace.
I have a mantra that I have spouted for years... "If I eat right, I feel right. If I feel right, I exercise right. If I exercise right, I think right. If I think right, I eat right..." Phil-SC