No it does not have to change colour if you are pregnant.
Changes in hormone levels during your pregnancy will change the appearance of your aureolas and nipples throughout pregnancy and afterwords as well. They can change in shape and color at anytime.
Is it bright yellow
Your cervix does not grow during pregnancy but the uterus does.
Your first signs of pregnancy most commonly include: * missed period * tender/swollen breasts * change in color of the breasts * fatigue
Yes, chicken is good during early pregnancy.
During pregnancy, the cervix becomes closed and blue or purple in color. Also the cervical mucus tends increase due to hormonal changes.
Nausea during pregnancy is caused by changes in the hormone levels in the body during the early stages of pregnancy. It usually happens early on in the pregnancy.
Bleeding during pregnancy is not "normal" but some light spotting is reported by about 50% of women in early pregnancy.
Urine. Ammonia. The smell of urine does not change in early pregnancy. Or late pregnancy.
In my experience, my belly button did not feel different during early pregnancy.