It depends.
Try not drinking or not eating sweets and see if you feel any better next day! (I do!
) Sometimes it's the food we eat or the alcohol - especially if you are more sensitive to these things!
(And yeah non-SA people can have hangover too!
)
(Or if you do eat the sweets and take in alco, make sure to eat proper! Ideally some protein..)
Just congratulate yourself for even 'getting out there'!! (That's what I sometimes did too!
)
Yeah, it sucks a bit to over-analyze, on the other hand you can see ways for improvement that way!
If you find just one or two people you can talk to, or have talked with, it can be termed a 'success'!!
About expecting too much - that's definitely a factor - it helps to just expect to be 'miserable' and just 'get yourself out there'.. and just name it perhaps 'learning to party' ... for some people it may come naturally (or they fake it really well or use alco or other substances to help..) others may need more 'practice'...