Yes, how long are your cycles usually? My cycle started about the same time as yours - on 10 May - and I am expecting AF today. If you are on CD31 I would think it more likely it's AF.

CD26 seems awfully late to ovulate - how does mycycle calculate your ovulation date? Are you charting and checking cervical mucous? I am not familiar with mycycle, Fertility Friend is what most of us use here.