these type of features can be seen in case of spurious pregnancy
that is seen in women desires of children or afraid of being pregnancy,
as she underwent test for pregnancy and also ultrasound
it is clear that she is not pregnant,
pills can cause side effects like bloating sensation of the abdomen, nausea, dizziness
etc, they will subside soon usually,
so if the symptoms persist she take antacids and antiemetics which will help in decreasing them.