Ovulation or implantation bleeding?

Okay y’all, 2 and 3 days ago, I had a tinge of blood in my CM when I wiped. (It was a light pink, not bright red). Now I still have stretchy egg white CM. Do you think that was implantation or ovulation bleeding? I have NO idea where I’m at on my cycle right now. I am 3 months postpartum and don’t know if I’ve gotten my period back yet or not after my PP bleeding stopped (it was hard to differentiate because I bled for a long time and it kept bleeding on and off several times). I’ve been testing every morning and I’ve gotten negatives. (Just using the cheap HCG test strips though)

1. Do you think I’m pregnant? 2. Should I get better pregnancy tests? 3. Has anyone gone through this?

My nerves are through the ROOF! 😅