ADVICE!!

On July 11th I had blood on the toilet paper (pinkish brown color). It was only on the toilet paper the one time and that was the only bleeding I have had since. AF is supposed to arrive today. Does this sound like Implantation Bleeding or just my period? When should I test? I just want some advice or stories you girls have had. Also, What were some of the first signs you knew you were pregnant? Thank you.