5-6dpo *I KNOW IM NOT PREGNANT YET*

So, I’m 5-6 dpo and I’m cramping today. This morning I had a sharp pain around my hip joint area, which I think may be unrelated. But now, this afternoon I’ve had one-sided ovulation like cramping/pain and a strange pulling feeling more in the center.

What goes on at 5-6dpo? CD 21/28-29, for reference. Anyone know what hormones are high or low that could be doing it?