please respond!!

Megan • 24 years old & married to the most amazing man♡ ttc #1
last night my DH and I BD it hurt when he went deep and after we finished I cleaned up and started cramping severely almost like period cramps. I am 2 dpo and it feels like alot of pressure when I walk. when your close to or are O'ing can sex hurt? and why was I cramping like that and still feel it now.