Help!

Emma

Okay so I’ve posted my calendar below. I had brown stringy discharge for about two weeks. Not a lot just a bit each time I wiped. I bled maybe 2-3 days in the middle. The rest was brown and stringy. We tried on the 12th. Then it went away Saturday and Sunday and now it’s back a little brown but more light. Should I be worried? Could this be ovulation or implantation bleeding?