What Do I Do About My Type 1 Diabetes & Swollen Ankles?

I'm hoping for some advice from someone in a medical profession or someone who's been here before...
I have had Type 1 diabetes for about 17 years. I am using an insulin pump and Humalog insulin. I have had problems with my ankles and feet swelling, but my most recent lab tests have come back normal. No kidney problems, no thyroid problems. I don't have any pain, just a lot of discomfort and embarassment caused by my legs. I'm only 25 and I feel like I have the legs of some little old lady (no offense to any little old ladies out there). I drink a lot of water, but I could definitely be getting more excercise...
Help me out! Thanks!