Anyone have implantation bleeding?

I'm supposed to start my period the 7th, but earlier today I seen some light pink blood when I wiped, figured my period was starting early. Placed a pad and usually an hour after spotting I'd have a heavy mess downstairs... Instead I get this...Any of you ever had implantation bleeding? What was it like? I haven't had pregnancy symptoms. Hubby and I have been TTC 6 months now.