Feeling ill after spells.

When I cast a spell I remember to ground and centre before hand, cast the circle etc. I always feel fine straight afterwards, I have something to eat and drink, but then after a couple of hours I start to feel really sick and tired. I know casting spells can take a lot of energy, but is this normal? Is there something I should be doing to prevent this? Or is there something I can do when this happens other than go to bed?
Thanks in advance for any help x

It's normal hun, and to curb it, find something to occupy yourself with. It'll help keep you awake, if this doesn't work, taking a 15 minute nap or drinking a cup of coffee will usually do the trick. Your body will learn to balance itself afterwards with practice.

Thank you :)