It could be old blood from implantation coming away, or it could also be from your cervix if its being sensitive- rest up, and call the epau tomorrow morning and see if they will give you a scan, explain how anxious these spots make you, and they should fit you in at the end of their clinic. They don;t want ladies worrying them selves into oblivion!
I bet everything is absolutely fine, but can completely understand the dread of seeing the spots.
I bet everything is absolutely fine, but can completely understand the dread of seeing the spots.