Am I being crazy?

Ma

So I am 3 dpo and I have all these weird symptoms. My stomach is cramping but not like pms cramps it feels more like stretching across my lower abdomen.

I have had a constant headache the past 2 days and feeling nauseas off and on. Obviously can’t test for a while yet, af due 11th of March. Is this or could it be anything or am I just needing to chill out?! This is my first month TTC