Hello....Im 31 mother of four natural births. Have had Tubal ligation (Essure). My period is usually on time like clock work with a 28 day cycle, four day period around the 7th,8th,9th of every month (have app to keep track). For the last few months its been off.... Oct. 1st. One day..then gone, Oct.7th-11th full period, then 30th one day,then gone. Nov. It came early to leave early... Nov.5th-8th three day!, Now...Dec. 5th today! its earlly but not its self very oddly light... help me understand a little