Weight loss with PCOS

Christina • Hello I`m a 23 year old university student studying Social Work. I struggle with Polycystic Ovarian Syndrome (PCOS)
Hello everyone I really am struggling to loose weight which is so common with PCOS. I have type 2 diabetes and just need to get better. I'm 23 I've been diagnosed for almost 10 years with PCOS. Has anyone had luck loosing weight with PCOS. Any tips?? Exercise tips and diet tips please. I'm in college so I have a small budget (under $80 per week for groceries) so  I can afford lean meats which ineat a lot but what else can help? 
Just a background on me; I'm a 23 year old type 2 diabetic. I'm 5"10 and weigh 270lbs. I've lost 20lbs since April but still need to loose 70 more. I'm on glimpheride, metformin xr, synthroid (my thyroid is now under control so this is just to keep it there), and gianvi birth control. 
Any tips would be wonderful. I am mildly active and working on a new work out plan so what I'm mostly looking for is diet plans and also success stories and what you did.