AF Type Cramps 5 dpo

I am 5dpo today and trying to avoid symptom spotting, but I've been feeling odd all day. 
I've been having tightness and pulling/pinching feelings since I woke up. Mostly on my left side like O pains, but also on my right every now and then. All this is accompanied by AF type cramps. It's not painful, just noticeable and a little uncomfortable. 
I know nobody can tell me if I'm pregnant. Just curious as to whether anyone else has felt this before.