Just plain tired....

Today has been "one of those days".  I'm bone tired, my glucose level (taken about 20 minutes ago) is 247, and I'm so discouraged I don't know whether to cry or scream.  I'm a therapist, and I specialize in substance abuse treatment.  I'm so busy helping others, that I sometimes "forget" (denial of diabetes?) to take care of myself.  I was diagnosed with Type 2 diabetes about 3 months ago and I take metformin x2 daily.  It makes me nauseous with food, without food, before I eat, after I eat, but it helps keep my levels fairly normal.  Will I ever feel ok?  Will I ever have any energy?