13dpo implantation bleeding??

This app says that my period was supposed to start today. My other app says not until Friday; today’s Tuesday.

Monday (13dpo according to glow), I had a lot of white discharge in the morning. About an hour later, I wiped and there was blood. That was the only blood that I’ve seen sense. I’ve got sore boobs, headache and I’m tired. I’ve taken a test and I swear I saw the faintest line, but if the bleeding was implantation bleeding, it would be a couple days until a BFP could show up.

Any who, I’ve heard that opk’s can detect early pregnancy. So today (14dpo), I took an opk and although it wasn’t positive, it’s darker than I’d assume the line would be at this point in my cycle. Any stories? Advice? Thoughts?