How to determine period from implantation bleeding??

It was 9 days from when I ovulated and my period this month is supposed to occur on the 9th. Yesterday I experienced a light pink discharge so light that it only appeared when I wiped. This morning I had nothing and then here at work I have red bleeding. I’m so confused as to whether or not this is my period or implantation bleeding. My husband and I have been trying for almost a year now too.. Has anyone else experienced this?????