AF was 3 days early , only lasted 2 days any info ??

Sophie β€’ 5years ttc , the one time I did I found out at 12 weeks that it turned out to be an ectopic & I had my right tube removed , I also suffer from endometriosis , praying this app helps me ! Baby dust to all πŸ‘ΆπŸΌπŸ’—πŸ’™

So AF decided to creep upon me 3 days early ( I'm usually on time or a day or 2 late)

I was very heavy for 2 days now it has stopped ! I still have awful backache & cramps .. my period usually lasts a good 5-6 days!

Any info as to why this is ? Never happened before so just curious

Thanks in advance