How Far am I? PLEASE HELP

If My last period was July 13, & I didn't have sex until August 7th & August 8th, & I received implantation bleeding starting August 15th, does pregnancy day start the end of implantation or the beginning of my last period? Because I didn't have sex all year until August 7th & 8th. So if I'm pregnant does that mean I am 8weeks & 2days pregnant (starting from the first day of my last period) or am I 2 weeks & 2 days pregnant (starting from the end of implantation?) HELP LADIES. ALL OPINIONS ARE WELCOME!