Just incidentally, if and when your doctor signs you back as being fit to work, it may be worth asking him that he notes on the fitness form that your return to work is dependent upon being able to test and eat as necessary to avoid hypo's and hypers. They can make comments about light work etc or limited hours etc, but it may be a good idea that you discuss with your GP when you are ready to go back to work....
In the meantime, it may be that the types of food that you are eating could be hindering some stability with insulin working. Did your insight course cover any aspects of this? I.e porridge may alter your levels, pizza, pasta etc....have you been told to eat a standard 3 or 4 jelly babies to recover from a hypo?-some persons (children etc) find that 3-4 jelly babies are too much and will sky rocket readings after a hypo.
You will get there, be positive and start back at basics again. Although being off work may imbalance readings again to when you are at work, so if you are normally active at work keep active at home, if you are deskbound at work try to keep to the same type of regime physically wise. Don't know if you use full unit insulin pens, or whether your DSN may give you a 1.2 unit dosage pen for your insulin, as sometimes a full unit can make a significant difference to levels.