How soon after conception did you think or 'know' u were pregnant??? IF I am this would be our 4th child 4 and under (eek!) We used 'withdrawal' on new years eve and Im worried I could be pregnant. Have felt like my periods going to start for the last week (crampy) and had shooting pains in boobs. last night I felt really drugged, warm face, fuzzy feeling like it was too much effort to smile. Still b/feeding almost 7m old baby but got periods back w the other 2 children at 7 months. Felt sure I was pregnant last night but not as certain if Im just paranoid now. The thing thats making me worry is I had 'fertility' signs the day after. What do you all think???