Hi Nancy. I agree with grazer, a couple further pointers that may be of help. A drop from 14 to 4 in the space of a few hours will more than likely give you a false hypo, all the symptoms but not the very low readings.
Something else that can happen if you have high bm's, is that you get a very strong second stage insulin response to lower ypur blood sugars. and can get go into hypo for a short period before your body shuts down the insulin production, this is one of the dangers of gliclizide. I've also seen this happen with my partner who is diet only control, seems to happen about 3 1/4 to 3 3/4 hrs after the spike, might be worth testing to check.
With regards to the morning effect, its as much to do with hormone release to wake you up, cortisol is released to stimulate the body out of sleep and triggers a glucose release, hence the spike. It might be worth talking to your GPwith a view to loading your evening metformin ( needs to be SR ) I loaded my metformin to start with until my morning readings come down and then re adjusted, at one setage I was taking all 2000mg at 10pm. I say it needs to be SR because standard metformin will have lost its effect many hours before you get up.
Finally with regards to your wgt loss, It might be worth checking your calorie intake of your diet, just to see if its a bit high to get the pound coming off. Wgt loss can be difficult and seems to go in fits and starts, seems like you've hit a wall on occasions, but stick with it , it will work eventually. Best of luck, you've had some great results so far keep them coming