Hi, i am wondering whether my 8 month old baby really need calcium? i have this doubt because he is not sleeping well, especially for recent several weeks. he will wake up every 1 to 2 hours, cry, roll over and over again,sit up with eyes still closing. he is very irritable also. and he sweats a lot when sleep even on these cold days. all these symptoms seem to relate to calcium deficiency but i am not sure.