Unexpected bleeding

Hi guys I’m new to the app. But I’m super stressed. June 29 I went to a carnival and was out pretty late with my friends and rode a mechanical bull. Got home about 1am and I had just a tiny bit of bleeding but I don’t start my period till next Sunday. July 7th. I’m on the pill and I have not missed any pills. My boyfriend and I had sex June 26 but he pulled out(he has never cum inside me) I’m really scared this bleeding was implantation bleeding... what do you guys think?