Hi,
i'm not type 2 but i know a little regarding what your saying,
With type 2 the syptoms are much slower and kind of creeps up on you.. so when you say you had no symptoms it could be that your body was getting used to feeling kind of ******!!
It can be a massive shock!! but It's great you've taken it in your stride and decided to change your lifestyle by walking and dietary changes!! so well done on your weight loss!!
Did you test your blood glucose whilst that was happening overnight? i know it may be a silly question as you probably weren't in the right state of mind but it would be a good idea to teach your wife (if she doesnt already know) how to test it then you may have some indication if this was due to your blood glucose levels?
Symptoms of hypo's and hyper's can be very similar, sometimes i think i'm low then test my BG's and its high or vice versa. quite odd sometimes!!
i have no experience in taking metformin so hopefully someone who can give you a better answer comes along
It's normal to be confused with having alot to take on, but you'll eventually learn how your body feels when high/low. but ultimately the only way your going to know is to test your BG's. so if you feel a little light headed, shakey etc then test your BG.
If you miss your medication in future keep an eye on your BG's every couple of hours too. then you'll know what happens to you!!
hope some of this helps