I O'd on CD 18 and had brown spotting 7 dpo...

Question

I have about a 10 day luteal phase. Could this be implantation spotting, or just the beginning of another period?

Answer 1

If your LP is normally 10 days long, this sounds like it could be premenstrual spotting. Yes it could also be implantation, but until AF is officially late it's hard to know for sure. ImpB only lasts for one day and is normally pink or brown, not red. Good luck!