Ovulation bleeding or possible implantation bleeding?

Hi ladies, so this last period was really unusual for me because it only last 3 days and wasn't as heavy as I normally am. I had a lil bit of spotting on the 2nd & 3rd but more so when I wiped. I had sex with my fiance on the 7th & then on the 10th I noticed I had spotting like pinkish/orange in color throughout the day not a lot I had a pantyliner all day and there wasn't much it was more so when I would wipe. The next day I had it off and on but a lil bit of pink/brown then on the last day it was more so tinges of pink in clearish like discharge. I have had some cramping and back pain. So I'm wondering if I'm ovulating earlier than what the app is saying and that's what that was. Or if it was implantation bleeding? My periods are normally irregular so it's hard to determine when I'm ovulating. I usually know by my discharge but this is new.
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