Hi Charliejack
It sounds as if you dipped low enough to have hypo warning signs, which is good because you now know what to watch for. You did the right thing by testing when you felt strange, and also the right thing by eating something sugary - fast-acting carbs to get your levels up.
6.7 is a very respectable reading to go up to after feeling hypo, and (I agree with Ka-mon) test again as usual to make sure you level out.
There is a saying on here that "4 is the floor". That is, if you go below 4 you should take action to get your levels up a bit. If I go below 4 and feel hypo symptoms, I will eat a couple of glucose tabs which hit my blood almost instantly, and test again after 15 minutes. If I'm up in the 5s or 6s, that's fine, and I carry on as usual. If I was still below 4, I'd eat another glucose tab and test again in another 15 minutes. I've never had to eat a third - it's never not worked for me.
I carry glucose tabs in the car, in my handbag, and (well-wrapped in plastic) in my meter cases. I have 1 meter at home and 1 in my bag, so I'm almost never without one. I seldom need to test when I'm out, but knowing it's there is reassuring.
You did the right thing, and you now know what to look out for, as I said before. Well done to you and your hubby! When you go to see the nurse, remember to tell her about this episode.
Viv 8)