My husband and I are trying to get pregnant. My LMP was on 10/16/08. We made love on the 20th, 21st, 22nd, and again on the 29th. Today when I went to the bathroom, I noticed I had a discharge similar to cervical mucus during ovulation but it had a color of slight brown. Could this be implantation bleeding so soon? My next period is not set to come until 11/11/08. If this is implantation bleeding, how soon can I test?