Possible not to have sore breasts when pregnant? I have all the signs except tender breasts. What week will tender breasts be a sign that I'm pregnant

It is not a must. Not all women experience soreness of breast during early part of pregnancy. Many actually have very little symptoms beside enlarging belly and missing the monthly period. Some have food cravings, others don't. Often some soreness of breast occur in early pregnancy, but typically improves as pregnancy progresses. So, u are fortunate to have less symptoms. Congrats and good luck.
Pregnancy. Did you miss your period? Have you had a positive pregnancy test? Tenderness of breasts often occurs as breasts become enlarged. A woman may or may not develop breast tenderness & timing is variable for each woman.