The earliest symptom I had prior to that was just this odd pulling sensation in my abdomen. It was totally unlike menstrual cramps
, totally unlike any cramp I'd ever felt, just a really quick momentary almost pinching sensation in my stomach that would then release. It would happen once or twice a day for about a week, and I would be like, hmm, odd...and then keep going about my business. I didn't initially connect it to pregnancy, not until my period was a little late too.