Lantus and legs and feet

I have been taking 100 units of Lantus at night for the past 4 months. I have gained 25 pounds, my legs and feet are swelled up, my joints in my fingers hurt, my right shoulder hurts like it has been injured but it hasn't, I have days where I can sleep all day and then sleep all night without a problem, my A1C is 9.1, I have the most painful cramps in my calves and feet, I feel like I am 100 years old and I am only 42.
Houston we have a problem.

I have had severe weight gain. 30lbs in one month of bloating. The doctor put me on Demedex for water retention. I have been on that for a week now and it has made no difference as of yet. This is ridiculous. I have so much swelling in my legs and feet that it feels like they are submerged in buckets filled with concrete. Yes my blood sugar has lowered significantly...but I am more miserable now then when my sugars were over 300. Is there anything else out there that is better than this?????