hi dont worry its normal. i had the same symptoms as yours just that mine is fainting spells. already spoke to my gynae about it. because the amount of blood that use up for the baby.
I think being giddy is normal but you may want to highlight to your gynae during your next visit
My gynae say if giddy just drink ribena or coke
Ye it is normal and hence be careful
kinda but do flag to your gynae
Sherry Lee