Nuvaring mess up 🤦‍♀️

Hello everyone😊 ,

Soo last week on wednesday my boyfriend and I had sex I take my birthcontrol out during sex and put it back in after usually but this time I had forgot to and left it out for 5 hrs I was supposed to start my period yesterday but didnt and it hasn't come today I started spotting brown blood yesterday could this be implantation bleeding or is that normal to spot before period. Has anyone else spotted before period and is it possible to obvulate a week before your period ?