Recently, I Was Flying Home From Las Vegas To Maryland.

Recently, I was flying home from Las Vegas to Maryland. During flight, I noticed I was a little crampy and realized my cycle started (SPOTTING FOR A FEW DAYS). However, I just ended my cycle a week before. Could the elevation of the flight have any effect on why I started spotting? I also visited THE Grand Canyon. I I thought that was an early cycle but my scheduled Cycle has begun. This month has been something. Thank you!!