When I go out socially these days I seem to be getting hangover type symptoms (severe headaches) whilst I am out i.e. as opposed to the following morning. What can this be, I am not what you may class a big drinker (about 5 pints per week)?
do you get any flushing, face reddening, runny nose or increased heart rate too? If so, you may have an alcohol intolerance. Maybe it's worth a visit to your doctors to get it checked out. You're right of course, you're not a big drinker, so I'd imagine the headaches are really annoying and would spoil your evening since they seem quite severe. good luck.