Idk what's going on

Walker bait • Mother of 3 wonderful kids, my middle child is epileptic and has ASD so I`m a stay at home mom I have been with my husband for almost 7 yrs but only married for 2 yrs. And as happy as can be.
I've never felt like I do today, Idk what to think. I'm 12 dpo and today my stomach started cramping really bad they come and go almost like contractions and I have diaherria and spotting. if it's my period it is early, but I've never felt like this with a period. Anyone ever feel like this if so do you know what was causing it. Thanks on advance