Is this from diabetes?

I have diabetes and my feet are always numb. Feels like I'm walking on pebbles and my toes are always numb. I can't get my blood sugar lower than 250 and I'm sleepy all the time. Today I slept almost 14 hours and my left outer labia is swollen and very hard. I'm having a hard time moving my bowels and it hurts very bad to urinate and always feels like I have to pee. Are these all from diabetes? Should I be concerned? I take 500 in metformin 2x a day, but it doesn't seem to be helping. Any advise?