Possibly pregnant?

Madison

I just got off birth control 2 weeks ago because my husband and I want to start a family. We've been doing the BD like crazy, my breasts have been so sore for about a week now and yesterday and today when wiping I have a tinge of blood on the toilet paper. Could that be the start of implantation bleeding? I'm not sure when that usually happens and my period isn't due for another week and a half. Thanks!