Insulin resistance

Anybody here dealing with insulin resistance? I’ve been diagnosed with PCOS and I’ve been really struggling with keeping my sugars in line without using an insane amount of insulin everyday. My most recent A1C was 7.0 so I’m not uncontrolled by any means but I’m wondering if there’s something different I can try. I exercise almost everyday, eat low carb and take 2,000 mg of metformin everyday. I’m still using about 200 units of insulin everyday and i’m gonna have to sell my right arm here pretty soon to be able to keep affording it. Any advice is appreciated.