So I'm 6dpo technically 7 since it's after midnight.

I've been experiencing cramps all day mostly on my left side, it's not a cyst being that I just had an ultrasound a week ago to see if a previous cyst went away which it did.

But the strangest thing all day is that I've been experiencing muscle pains in my lower area such as lower back, butt cheek muscles and thighs?? No I was not doing squats or any workout for that matter. Is this a sign of PMS or possible pregnancy?