TTC newbie

Erica
Is it possible to have pregnancy symptoms 3 dpo? Yes my dh and I did bd. I have a 2 years old and I feel like I did when I was pregnant with her. She was not planned, so this ttc is so
new to me.  I have extreme fatigue and breast tenderness. I am not suppose to miss my AF until the 3rd. Also how soon can I test? I am getting mixed answers.