hi, i have a year old baby.. it was normal delivery. i get shoulder, back ache very often. everyday i wake-up with one or other aches.. i couldn't walk for a long time i get knee pain soon.. not even a kilometre.. i was very active before delivery.. after delivery i never took calcium or iron supplements.. is it happening because i didn't take vitamins ? if yes can i start taking vitamin now ? will it be effective for me ?