Need advice please

So I've been tracking my ovulation this month and I thought I ovulated yesterday. However, I had some pretty good cramps on the 14/15 of this month and I got a positive opk those days along with the rest of the week. I started spotting yesterday. It was only when I went the bathroom and I looked it up and women said it could have been ovulation bleeding. I stopped spotting and then today I started again just now. Its a brighter red and it was more but once again only when I used the restroom. Could it actually be implantion bleeding instead?? Af isn't due till the 2nd. I posted a picture of my opk for the whole week. I'm at a loss. This makes 3 months ttc.