I am 29 yrs old and I & my husband are trying for a baby. My periods are always regular (30 days). My last period was on 11/13/07 and I had brownish discharge on 12/06/07, lasted for 2 days then I got light period like bleeding for 1 ½ days. It was like an implantaion bleeding. I have all the pregnancy symptoms but negative pregnancy test(did on 12/16/07). What's going on? Any help please.