I'm 5 weeks 2 days pregnant, this is my third child, i am not having any symptoms of pregnancy nor do i feel pregnant at all, is something wrong?

Should be normal: Some women may not feel like it's a blessing to NOT have pregnancy symptoms, but this can be entirely normal. There are women who go into the 8th month of pregnancy without "feeling" pregnant, other the protuberant belly :). Unless you start having bleeding, which is cardinal sign of miscarriage in the first trimester, I would be very happy to have such a quiescent beginning !