I had a D&C on June 23rd. I started TTC around July 25th when I noticed fertile cervical mucus. I had not gotten my period post D&C yet so I don't know what cycle day I'm on. I also wasn't testing OPK. Last night after sex I noticed very faint light pink on the tissue paper. Could it be implantation? When should I test to see if I'm pregnant? It will be 6 weeks post D&C on Monday and no PMS symptoms yet.