TMI- I'm 9 days late

Ashley
Had sex early this morning and there was a little blood when I wiped. I put a pad on because I'm sure the sex convinced AF she needed to start. And went I went to the bathroom just now - nothing. Not getting my hopes up but advice or info would be welcome. Also I had a blood test done for quantitative and it was negative for pregnancy. But I'm not sure if it would pick anything up if I O'd late.