What Could Cause Swelling In Right Lower Leg?

a little over a year ago I started having swelling in my right lower leg.i have been put on Lasix which has not helped.. I started having back pain about 3 months later. I wet to back Dr. and had an MRI to find I have a bulging disc. I had a steroid shot in my back which has helped the bak pain, but recently the swelling in my lower right leg has gotten worse, in the last 3 weeks my big toe and 2nd toe have been asleep and now in the last week my whole right foot falls asleep when im walking. I am diabetic, but it has been under control. I am afraid of falling while im walking,and am tired of hearing that its neuropathy. it is getting worse and I have not been tested to make sure it is not something else..any ideas? if something not done ,as quick as this is getting worse I am afraid I will be disabled soon or worse.