Drug use during pregnancy may affect embryo development, but it is not absolute. The amount of exercise during pregnancy 16-20 weeks is related to fetal tolerance. In the case of intrauterine pregnancy, if you are pregnant for more than three months, you can do B-ultrasound examination and amniocentesis for further diagnosis.
According to your description, it belongs to the problem of taking diet pills during pregnancy, which really affects the baby. It is reasonable to say that pregnancy doesn't matter during taking diet pills. But generally speaking, diet pills should contain more than one ingredient. There are many kinds of diet pills on the market, which contain many side effects. Therefore, when we use diet pills, we must pay attention to whether it will affect our baby. Otherwise, the consequences will be unimaginable.