The chances!?

A week ago today, I wiped and it was light light pink spotting. I was 4 days into my fertile week. I'm now at 10 DPO and my boobs have been sore for about 4 days, headaches, nauseous, SO said my nipples have discoloration, BUT I hadn't ovulated before I seen the pink spotting. I had this on a Sunday & I ovulated on a Thursday.. But I did have sex between them times. What's the chances of me MAYBE conceiving?