Implantation?

Has anyone ever felt implantation pains or had any implantation bleeding? 
​Me and my SO have had unprotected sex a few times this week and this evening I've been having some light cramping in my left side. I may be looking too much into things but it feels like menstral cramping but very light. I'm CD 10 by the way. 
​Just some opinions please I'm new to this!