Implantation bleeding?

Brittany

My husband and I have been ttc since October with no luck so far. I ovulated on the 20th and yesterday I had a tiny bit of dark blood in my cm after I went pee. It was middle of the day when I saw it and didn’t have any before or after. My period is supposed to start in 5 days. Could this be my month? I’ve never actually noticed implanting with my 2 previous pregnancy but we never really had to “try” before either. Thank you for any feedback!!