Cramping??

I’m 4 DPO according to the app and yesterday and this morning as I’m writing this I’ve been having this mild cramping sensation in the middle of my lower abdomen. I’m not sure if it’s implantation cramping or not. Our son is almost 7 so I remember nothing about the weeks leading up to finding out I was pregnant. I guess I’m hoping this is a good sign and I’m trying not to dwell on it too much since I’m trying to hold out to at least 10 DPO to test. Anyone else experiencing this??