I was at the climbing gym today, first time climbing in almost a week. Climbed a really long route that took a lot of energy and when I got down I felt fine but then I walked over to another route and suddenly my upper hearing all kind of disappeared. So I went over and sat down for a few and it came back but then I left. Does this sound like something that would normally happen from over exertion? I assume it's from my blood rushing to my body to replenish oxygen to my arms and legs.