If you don't describe this as a hangover, then I'd hate to know what kind of hangovers you've had.
An alcohol hangover (and as a preface, it was only once, drinking legally in the UK, and my first pint with my parents) which is nausea, headaches, and grouchyness. I'd take a weed "hangover" over and alcohol hangover any day of the week, month, or year.