I have taken my medication (Cipralex, 20 mg) yesterday at bedtime but my stomach was empty! I felt the day after: headache; upper back pain; dizziness; shiverness; accelerated heartbeat. I have exercised to ease these symptoms; exercising usually makes me feel like being undepressed but this time it has just eased the symptoms. Could you help me with that? What causes so: the medication or something else?