Implantation pains

Katherine
Just a quicky for all you lovely ladies. Can anyone tell me what exactly implantation cramps feel like and where about you feel them? I am CD22 and this evening I've had an odd pinchy pully feeling in my lower abdomen, sort of around my pubic bone area. Never felt it before. It was only there for about 30 seconds, and now I just feel a touch uncomfortable. Any ideas? Xx