I'm glad you didn't panic and that it went away. I think things like that just happen sometimes and people who aren't emet just ignore it like we would a scratchy throat or a little stuffiness in the morning. Since it did happen when you just woke up maybe your stomach was waking up a little later than you were? If you feel fine and it's happened before than you will be OK.
\"As soon as you trust yourself,you will know how to live.\"
Johann Wolfgang von Goethe
\"Do not anticipate trouble, or worry about what may never happen. Keep in the sunlight.\"
Benjamin Franklin