Help I am very concern.. I got my blood work done a week ago for my second trimester.. I got a call from my dr telling me I need to go in tomorrow for an ultrasound because there is an abnormality in the blood work . I have never had a sonogram so far and I am 16 weeks pregnant. Has anyone had this happen? If so what was wrong? I am very concern and I am so desperate to know what's wrong.. Please help.. Tell me your .. Experience?? Sorry English isn't my first language.