Anxiety, insomnia, alcohol

Hi all
After a pretty alcohol fuelled wedding the other day, I have been experiencing terrible anxiety and insomnia as well as a general and unshakeable feeling of depression and sluggishness. The thing is, it is now Tuesday and the event was on Saturday, and it wont seem to go away.
Anyone have any ideas on this, because I didnt use to respond in such an awful way to alcohol - I know it is my own fault for drinking, but I used to be ok - I don’t know what changed.
Incidentally, has anybody experienced this either as a symptom of post-drinking anxiety, or just in general? I get it from time to time and it is pretty unbearable. Derealization - Wikipedia

Yes it’s normal and it will go away TRUST ME your not crazy