You dont need a meter....... :roll: They would say that, it is the stock answer to many usually governed by cost constraints. I'm a Type 2 and without my meter I would have no idea what is going on. An average tells you absolutely nothing at all.......it misses any highs and lows which could explain why you feel so rough over the day. Many buy their own meters and manage to get strips prescribed, if not then sometimes we have to buy them for the sake of our health.
If you don't want to get yourself a meter and test for a while....that's obviously your choice. It's not something I would recommend you do........you need to test.
There is also the fact that what you are experiencing can be down to many things, many unrelated to Diabetes. I would suggest you discuss how you are feeling with your GP.
Appreciate that you lead a busy life but as a Diabetic meals are important, the type of foods and also the portion sizes. Your eating habits may be contributing to the way you feel ? Without some testing you will never know !