Cycle change

Je
So every time i did an ovulation test, and it was negative, when i logged it on Glow it pushed my cycle out another day. Well, i never got a positive test, they got darker, but not as dark as it should, so i logged "no LH surge". Now it's showing a 40 day cycle for me and today would normally be my 31st day, AF day. Kinda irritating.