Could it have been implantation

So I noticed last week I was feeling like a prickly feeling on the right side and my back was hurting a little bit which I thought was strange cause I still had a week and a half left before my period. During that time I had also noticed that my boobs were sore. Today they aren't as sore as they was last week and Friday I had came down with a head cold. I try my best not to spot symptoms but now I'm starting to wonder if what I was experiencing was implantation. Any help from anyone will be greatly appreciated and this would also be my rainbow baby.