on call kicking

i felt my baby move the first time when i was on call in the hospital at about 15 weeks... i was laying in bed trying to go back to sleep at 5 AM after admitting a patient but i was having difficulty due to my extreme hunger... i think it was going through a growth spurt. i felt some fluttering that wasn't like my hunger pangs. on call again now i'm feeling more flutters... i'm beginning to think it thrives on my hard work...