Hi Zoecrean,
I would definitely check thyroid, as others pointed out - the symptoms are fairly similar to depression. And then - depression is a possibility. It is more common in diabetics, both because we have an additional burden, especially not easy if someone is prone to feeling guilty, but also because swinging/extreme blood sugars also influence mood. And then the vicious circle starts, diabetes feeds depression, when depressed you make your diabetes worse etc...Your symptoms look depression-like for me.
Also, you mentioned your not great numbers - for me every prolonged period of not-so-good-control ends up with a longer time of feeling exhausted and tired and sleepy in general, my body needs few weeks to regenerate.
I'm new to UK so I'm not sure what is the best way to tackle depression in this system, but when I met my diabetic consultant at the hospital, he mentioned that they have someone to help depressed diabetics.
I went through a cognitive-behavioral therapy, plus meds, plus physical exercise. The difference before/after is so huge, that you regret every wasted day before you decided for treatment. If you decide for therapy, you have to find a therapist who will suit you, it might be tricky.
Take care,
Ania