Spotting during fertile window?

My husband and I are trying to get pregnant with baby #4. This is my first month off of birth control. My last period was from January 27- February 1 and my cycle is usually every 28-29 days. Glow is telling me that today is the day I’m expected to ovulate. But for the past week, I’ve been having clear egg-white like CM which I know is a sign of ovulation. Yesterday and today I’ve had minor cramping that comes and goes, nothing major. This morning I went to the bathroom and had this on my toilet paper (picture below) I only noticed it 2-3 times throughout the day, the other times I saw nothing. I don’t think it’s my period since my periods don’t usually start like this, and I just got off my last period 9-10 days ago. Is it possible I ovulated sooner than today and this could be implantation bleeding? I never had this with my past 3 pregnancies so I’m kind of at a loss and looking for some info.

Thanks!

UPDATE: now on day 3 and still having the same spotting but the cramps have subsided. I read that you can spot during ovulation but it only lasts about 1-2 days. And I think it’s way too early in my cycle for it to be implantation bleeding. So still at a loss and starting to think something is wrong..