Recently Diagnosed with Diabetes, Need Advice

I've recently been diagnosed with diabetes. I was I. the hospital I'm January got my blood sugar tested daily before any meal. they never said I was diabetic but gave me insulin 3 times a day. I also have PCOS which means my body already produces too much insulin and I've gained 25 lbs since then. I was never TOLD I was diabetic til my new primary dr saw me 2 months ago. my feet are too swollen to fit shoes I've been waking everything in sole less slippers but I feel like I'm walking on everything. ... any one give me some advice?. new to this and jus Confused with it. thanks in advance