Clare,
Yes severe hypos are really tough. I imagine that fighting a phobia like yours is tough too.
Like Rob I have had a few severe hypos over the years including ones where I have woken up to find myself in A&E or with an ambulance paramedic waiting for me to open my eyes after they have given me a glucose shot. I have absolutely hated it every time this has happened but I have also learnt that the best thing to do is to try to understand why it happened and take action to reduce the likelihood of it reoccurring in the future.
Is it anything in particular about going into a coma that scares you or is it just the thought of becoming unconscious by itself?
Getting the "hypo shakes" when your blood glucose drops below 10.0 would seem unlikely but not necessarily impossible. At the very least I would get your meter calibrated to ensure that it is giving accurate readings. I would agree with Rob that if you have hypos on your mind then you might think one is happening when your level is perfectly fine. That is why it is always wise to test, if you can, to be sure.
In the period after your lunch do you have the option at say 2.30pm to have a snack like an apple, a banana or a couple of digestives with a cuppa? This would be a precaution against your blood suger dropping off as the day continued but is small enough to not merit an extra injection.
Have you tried or thought of trying Continual Glucose Monitoring System (CGMS). I could give you a description of it if you have not heard of this before although I am sure there is plenty about it on this forum - search for CGMS.
With regards avoiding night-time hypos I would strongly advise taking a look at a thread where Northerner describes his recent efforts to avoid waking up with a low blood sugar. It can be found
here and provides a lot of good insight although it is quite long now!
I really hope that you do start avoiding the hypos and that you also have success handling your perfectly understandable phobia.