My last m p was dec 10,2007 I was most fertile 24-28 I believe I had intercourse on the 23rd to 24th 26th 27 28 30 31 1 2 unprotected I have brown spottin now its sticky and it doesn't have a odor it started yesterday night it was light pink then it turn brown could this be implantation bleeding?

I answered your other posting on the same issue. Please read that one.