I had a day or so of those tantrums - I got lost walking to the bed in the dark which was rather novel, but during the day I found that taking a drink - sometimes just water did the trick, if I could sit down and let them pass, but if I had things to do a few grapes sorted it out quickly - just 3 or 4 and a slight pause.
They can be quite frightening, but as type 2 - and I don't take medication now, once things start to settle down towards normal I've not had any real bother. I did find that I felt really tired mid afternoons, but I altered my meals to be further apart and that seemed to make a difference.