PREGNANCY

I am very sorry about the picture. But i just badly needed some goods answers. So here's my thing, My period started on MARCH 30 and ended on APRIL 2. my partner and i had an unprotected sex 5 and 6 days after my period (April 7 and 8) but he pulled out and ejaculated outside me for 4 times. And on APRIL 12, I had this bloody brown discharge that only lasted for hours. I was wondering if that discharge could be an Implantation Bleeding? Is there any chances of me getting pregnany? Please help. I'm freaking out.