Firstly Happy Birthday!!

Secondly I wouldnt really worry, this happens to me and I think it happens for a mix of reasons - firstly due to alcohol and crap food your blood sugar levels have been on a rollercoaster - so I would get it in check by getting back to your more controlled diet.
Also you might not realise it but you are probably dehydrated from all of that stuff so try and get about 3l in there for the next couple of days.
Your sleep pattern will have been broken and all over the place so get back into your program. I would focus on for the next 2 days, drinking water, eating healthy and sleeping for 8 hrs when you normally would, your body should automatically return to its normal state