Could implantation be passed off as an early period? My period for may came over a week early and was barely there for 3 days.. 5/24-5/26 and glow tells me I'm on my 2nd day of my fertile window as of today which would put me someone near 20dpo. (if I conceived) i didn't take a pregnancy test because I started, but now I'm thinking different. I'll test tomorrow, but thoughts please??? I've noticed cramping only on one side and a sensitivity to certain smells lately and randomly got sick yesterday morning but I felt fine afterwards.