Bleeding TMI

I’m 10 days late and I have unprotected sex so I figured I was pregnant. Today I started bleeding but it didn’t look like period blood, i went to use the bathroom and a small pea size ball of blood came out, then still some light bleeding. I’ve taken a pregnancy test but they were negative so I figured it was too early to show. I’ve been experiencing tender breast , cramping for about 2 days now, back ache, hungry all the time, stress , tired. Does the bleeding indicate a very late period or something else ?