Sorry to butt in, I am having the same thing, been TTC since March. AF is due on monday, got some spotting (only when I wiped). No cramping but general discomfort in that area. I am told that implantation happens anywhere between day 8 and 12 past ovulation and that it can be anything from bright red fresh blood to brown or pink staining that can last anywhere from 1 to 5 days. It was such a vague answer. It is driving me nuts not knowing. I still think it is to early to test (although bright spark doctor did a blood test anyway) dont think my tests will come up with anything yet because if it is an implantation then it is only just starting so the hormone level wont go up yet.

Ive not had any spotting or anything before either so fingers crossed for us both. Good luck.