Hi I Had 2 Ct Scans Done Of My Chest

Hi I had 2 ct scans done of my chest ,4 days after I gave birth to a baby .It was done for blood clots on chest but there was none.The docters told me the risk of CT scan and said I will be at hight risk for breast cancer . I am alway scared.I have 2 boys and I want a daughter,would it be save to become pregnant now.