Period or Implantation Bleeding?

So. I need some advice/opinions. My husband and I were going to try to begin conceiving next month but I had my BC taken out in April because we wanted my body to be adjusted by the time we began TTC. According to Glow June 6th was an ovulation day with 33% of getting pregnant. We did it anyways. It's now been two weeks and I was supposed to get my period tomorrow (21st) but I got it late Saturday night (pretty much almost Sunday). It was extremely heavy on Sunday (18th) and Monday (19th) it was moderate. Now, it's completely gone. No pink or anything, just gone and that's definitely not like me at all. I can't tell if it was actually my period or if it was implantation bleeding.

What are your thoughts?