question: Hi, I started taking shelcal 500 since last week under doctor s prescription (since i was having severe leg pain for past one month). From the time im taking shelcal (alt days) im having trouble sleeping, having nightmares if i sleep in the afternoon, feeling tired, exhausted, and sever nausea and uneasiness in my stomach. Can this be triggered by shelcal since nothing else has changed in past 1 week.