WOW! Congrats! You did a great job! What an accomplishment.
Uuummm... it sounds like you had a side cramp of sorts. When I overexert myself in competition, I get this horrible cramp under my ribs on my right side. It typically happens when my breathing becomes labored and I am working too hard. I have learned how to massage it out while breathing deep.
Keep up the great work!
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather, to skid in broadside thoroughly used-up, totally worn out, and loudly proclaiming: WOW WHAT A RIDE!!!!"