I would have conceived on Oct. 19th. I had what I thought was a period on Nov. 4th (5 days late) and it was a bit shorter than usual and lighter than usual. Have been experencing extreme fatigue for about 3 weeks although it has eased up a bit in the last week, my breasts are big and tender, nausea on and off for past 3 days, especially if I am not eaten in a few hours, craving meat and protein, taken about 4 home pregnancy test, all negative. I feel very pregnant or there is something else going on that feels exactly like pregnancy symptoms. I am healthy 37 years old and have a 3 year old child.