Implantation bleeding or period?

Hello im new on here, i have pcos and am on clomid.

I've been hoping I am having implantation but I'm not convinced now. 3 days ago I started getting brown spotting and light red spotting and my period was due today. My husband and I had intercourse today and the bleeding become more red and heavier so I think it is just my cycle, has this happened to anyone else and it's still been implantation?