I've been trying to get pregnant now for 4 months with no success. I have two children already, and have sex on a regular. I also know when I ovulate which I thought would make it easier. With both of my other children, I became pregnant almost immediately. I don't know if I can't get pregnant or if our timing is off. I find it hard to believe that having sex at least twice a day, everyday wouldn't do the trick. He has a child from a previous relationship so I don't think he is the problem either. Besides going through expensive fertility testing, I'm not sure what else to do to increase my changes. I'm almost 33 and would like to have all my children before I turn 35. Help!!!!!