Concerns about futore

I got diagnosed with T1 diabetes in 2015, but almost 3 years later I don't feel like I've made a real improvement. I did a quick AC1 test on my freestyle libre and I got a 7,4% or 57mmol. I'm just 16 y/o but I'm scared for the futore. (it may seem extreme) Are there any things I can do to increase my chance of keeping all of my feet. It could be the placebo effect, but I think I've already lost some eyesight and blood circulaction. Any help is appreciated. I'll be awake for a few more hours since I need to wait for my glucose to come down safely.