"Novorapid injections of 20 units at breakfast, 16 at lunch and tea and Levemir injections of 24 units in morning and 20 at night."
This NHS document from one Cambridgeshire
http://www.cambridgeshireandpeterbo...eaflet_for_TYPE_II_Dec_07_patient_leaflet.pdf suggests that people with T2 on several injections a day should test before meals and at bedtime either daily or the same pattern, 3-4 times a week if well controlled. This is I would have thought a minimum.
From what you say your diabetes is not yet well controlled (see below about HbA1c) so you should be testing 4x a day requiring a minimum of 28 strips a week for that plus some extra to test if you feel hypo. It would be good at first to be able to test during the night to see what happens then. If you ever drive, then you would need more.
Just testing without using results though is pointless. You need to test but also record your results, also what you ate and whether you did any exercise. It's only when you can see what's happening by looking for patterns that you can begin to adjust your diet/injections. (you could put your findings down in a post on the T2 with insulin section and people may be able to help you)
Hypos, levels lower than 4mmol/l are not normally best treated with a bowl of cereal. The standard treatment is 15g of fast acting glucose. Glucose tablets are cheap, they don't taste very nice so are a good option as most people aren't tempted to eat too many (I don't find I need as much as 15g, most times I just take 1-2 tablets but we are all individual)
If it's a long time to your next meal you may need to follow that with 15g of longer acting carb; an apple would have about that, a piece of fruit is in fact what my dietitian suggests but you could have half a small sandwich made with seeded bread or a very small portion of low gi cereal (all bran for example)
But, if your basal insulin (Levemir) is correctly adjusted then it should be very rare for you to go low overnight.
You don't make it clear bit do you inject when you don't eat lunch or are you actually eating lunch? Injecting a bolus insulin (novorapid) without eating is liable to send you hypo if you were at a normal level before.(one sausage roll from Greggs is 350 calories by itself so could be construed as lunch for some of us though! )
I also noticed you say that your HbA1c was 22.3mmol/l. HbA1cs in the UK are now normally recorded as mmol/mol. A normal level would be about 31-40mmol/mol (22 would be below normal and if you had one that low I doubt as a T2 you would be on insulin, 15 is so low as to be practically impossible , you would be permanently hypo )
http://www.diabetes.co.uk/what-is-hba1c.html
If I were you, I would ask my GP what my last HbA1c actually was. (don't muddle it with fasting glucose which would be in mmol/l, as is the reading on your meter,)