Implantation cramping?

According to glow my period is due in five days. My other two apps say 6 and 10 🙄🙄. Pretty sure it's in 8 though.. Anyways. I'm having sharp pains in my left ovary. They're not painful. Could I be implantation cramping? Today the left side of my belly button was full of some uncomfortable pressure. This tww is really killing me 😕