Implantation or period??

I had sex on May 25th and he pulled out but I think a lot of it went in me. The first day of my last period was May 5th. My period is due is about 2-3 days. This stuff is more brown than red. Could it be the brown discharge you get due to implantation?? This would be my second pregnancy and also wanna know what you guys’ second pregnancy symptoms were. I’m not sure if the symptoms I have are pregnancy or just my period.