Firstly stop reading things – only your surgeon/a doctor can give you sound medical advice and you’ll just make yourself panic (which you seem to be doing which won’t be helping you) and feel worse.
I would suspect the reason you’re feeling so sick is because of the general anaesthetic, your notes should say that it is a side effect. If you’re worried, speak to your surgeon/a nurse. I hope you start feeling better soon, it’s worth it in the end!