Lightheadedness It often happens that lack of
blood supply to the brain and heart during pregnancy leads to weakness, dizziness, confusion, and thus lightheadedness.
Anxiety Anxiety is a common major symptom observed during pregnancy. It is caused mainly due to irritation, hormonal changes, nervousness, and possibly due to low blood sugar levels.
Fatigue Excessive exertion makes a pregnant female feel very weak and tired, since the energy requirements of the body are not fulfilled.