My baby is 98 days old...she randomly shake her feet like shivering for 1-2 secs.. most of the time I noticed while breastfeeding or after feeding she is in half sleep...it's happening like one leg at a time.... doctor told me to take a video..but it's coming randomly.. somedays 2 to 3 times.. somedays nothing at all....is this normal...her calcium level is 11...her sugar as well normal..then why this is happening...when I searched in the net it shows seizure and al.....I am very much worrying please help..