Spotting from flying?

Can someone please ease my mind about spotting? I’m 6W4D and haven’t had any spotting yet but tonight I flew for the first time since being pregnant and noticed some very light brown spotting. Has anyone ever experienced this from flying? I did notice some cramping on the plane as well. It’s my first pregnancy so I’m trying not to over analyze or worry. We did see the little bean on Monday who was healthy size and had a good heart rate.