Cramping at 6 dpo- implantation cramping or early AF?

Jen

Hi ladies, woke up this morning with some mild cramping (I'm 6 dpo). It's been on and off (but mostly on) for the last hour. It's mostly dull but once in a while I get a sharp cramp on the left side. AF is not due for 8 days but I'm afraid she's coming early. Anyone else experience this? Were you pregnant or did AF come? I know the symptoms are very similar so it's hard to really tell but it helps reading everyone else's experiences!