Spotting help!

I have had so many pregnancy symptoms since after OV and last night I got what looked like implantation spotting. Was pinkish and brown when I wiped but this morning the bleeding is heavier. Still dark and slightly clotty or mucus mixed. I'm only about 9dpo but seems like too much to be just spotting. Is it possible I didn't implant successfully and period has come or could it still be IB?