Implantation???

Caitlin
I just had a weird spasm, pulling cramp on my left side. It lasted for like 2-3 minutes. Then my back started hurting. 
Could this have been implantation?  
I have been pregnant 3 times (all ended in miscarriages) and I wasn't tracking anything those times. So I don't really remember if I had this or not. 
AF isn't due until either the 16th or 22nd. 
My cycle was weird last month.