i think i may be 4 weeks pregnant and i have to urinate alot, feel queasy but never puke, my lower back hurts, i get some cramping almost as if im getting my period. last week my boobs grew up a cupsize, and my nipples were hurting so bad i wouldnt let anyone touch me, and i have these crazy mood swings, also i have been craving some werid food and lately all i want is chicken. is this all in my head?