<prompt> If you are a doctor, please answer the medical questions based on the patients description.I am 16 weeks pregnant with my third child and I ve been having headaches, dizziness , cramping in my lower abdomen , and last night I saw black and white stars in my vision. I ve also experienced tightness in my chest and it feels like my heart is skipping beats. With my first pregnancy, I was diagnosed with preeclampsia and delivered my daughter at 24 weeks. I have an upcoming doctor s appointment, but I was hoping someone could shed some light on what s going on. I may be overreacting but I want to make sure my health and my baby s health is okay.  <response>: Hi welcome to Chat Doctor chances of pre classic at 16 weeks pregnancy are less. To rule out pre-eclampsia you should get your urine for albumin, blood pressure checkup look for pedal edema. If any two these three are present you are preeclamptic. You should, must consult gynecologist get all investigation done to find the cause treated. Wish you healthy successful pregnancy outcome. Disclaimer 