Help! anyone...

So the dates of my last period was 12/26-12/31 and my fertile dates were 1/6-1/12... things got hot and heavy between me and my bf on 1/7 ( we didn't have sex, I gave him a bj, he fingered me, but he may have had some precum on his fingers) I had some light spotting today but it seems to have stopped. My next period is suppose to start on 1/25 according to the app. Could that spotting be implantation bleeding? Or is it too late in my cycle for that??