About 2 weeks or so after my last period in June I experienced fatigue, swollen breasts and headache's. At that point I guess the egg would have just been fertilised.
For me, the morning sickness (or 24 hour severe nausea as I call it) didn't start until about week 7 of the pregnancy, it affected me pretty badly so I remember vividly!! Thankfully it subsided at about week 10. Now, at week 23 I can't stop eating! Best of luck to you lublu, how long have you been trying? Are you taking folid acid suppliments?, if not, you should.