it could be the tablets, codeine always made me sick so they gave me codryamol instead.
It could also be the anesthetic, if it is a suggest you drink plenty of fluids as it pushes the drugs out your system quicker 🙂
are you eating hun? try dry toast even if you don’t feel like it as you’ll start to feel faint, or you can pick up oat cakes in the biscuit isle of asda in clear wrapping (they’re VERY bland, but you’re unlikely to bring them back up because of that reason) xx