Trying To Concieve

Hey y’all! My husband and I have been TTC for almost 6 months now. I ovulated on the 9th or the 10th (I don’t remember) but yesterday I started feeling really nauseas with some cramps and I woke up with a horrible headache. Same thing this morning, woke up feeling super sick, cramps & then around 11 my head started hurting. Still should not be expecting my period until the 23rd (my periods are always very consistent & spot on). & they don’t really feel much like a period cramp to me. Did anyone else experience these things?