Can Withdrawal From Deanxit Cause Any Problem During Pregnancy?

Hi. My daughter is 22 years old. she is married 4 months ago. She has a very stressed nature. Last 4 years she had symptoms :nausea, stomach pain, ventre pain. She began to have tension headaches when she was 8 years old. Doctors said that she has nothing physically. To treat her digestion symptoms, the doctor gave her Deanxit last 3 months. Now she is pregnant 3 weeks ago! She stopped Deanxit 1 week ago. Is there any problem for the baby? I am very anxious. What should she do?