If I took a negative test today (11DPO) is it still possible?

Erin

I’m 11DPO today, confirmed by a positive OPK test on my ovulation date.

I took a test today because I’m having symptoms that could be period symptoms, but they could also be super early pregnancy symptoms (this would be my second). It was negative, but could it be possible I tested too early if my period isn’t due for a couple more days?