I'm glad you didn't stop after the five minutes. That's a good idea, keep writing but let people know when the time was "up"
If this is a true story (hope it's something you imagined), the doctor probably wouldn't be able to tell you what happened. Besides the obvious explanation of stress, there can be transient events that affect memory and perception, but once these pass it's hard to tell what has happened.
Best thing is, try not to worry (I know that's ridiculous to say). But worry makes things worse. As long as the people around you think you are behaving rationally, then this is probably just an episode and it will pass.
If this isn't a true story, wow... you really write persuasively.
Hope that is the case.
Very good luck to you.