Last night I got drunk (myself and DH at home). I'm not a big drinker but last night just went a bit OTT. Mixed my drinks and was just a bit foolish.
I woke up at 1am feeling utter terror. I had to wake up DH who sat with me until 3am. I've never experienced anything like it in my life before. Just an overwhelming feeling of doom and a feeling of total loss of control. I was absolutely terrified even to the point I thought I was going to die 
Finally fell asleep. Woke up with a hangover but mentally feeling much better. The 'episode' had thankfully passed, whatever it was.
I've now been feeling a constant low-level anxiety/panic all day today as well as physically a bit dodgy which I think is the hangover.
I'm late 30s and have never had anything like this happen before. DH was really concerned and it's left me really shaken up.